I consider myself a Christian Mystic, so of course I've been a little curious about Crowder and his teachings about the "New Mystics." I think for the most part our corner of Christianity thinks poorly of anything called mysticism, just because we don't normally use that name. However many of our common Charismatic and Pentecostal practices are mystical in nature, according to the definition of the term.
In religion, sects that are mystical in nature are ones that place value in experiencing spiritual things. Asking Jesus into your heart is a mystical thing to do. Reading the Bible and expecting God to speak to you or the Holy Spirit to reveal the true meaning of scripture is likewise. And pretty much everything having to do with the Gifts of the Spirit.
Christianity has a long tradition of mystics, mostly forgotten by Evangelical Christians because we think they were weird. Crowder tries to bring his movement back in touch with the history of these saints, and seeks to combine their experiences with those of the Pentecostals (iirc, I read a couple of his books some years ago.) In theory I think this is a decent idea, and is rather similar to what I do.
In practice though... there are many things that fit the category of "mystical" that are not necessarily good! People can have mystical experiences with any number of pagan gods, or even Satan himself. But if we react to that fact by saying all experience is bad, then what do we have besides empty religion? Christianity is supposed to be a path that allows us to connect with God, and if we don't ever make that connection (or remember that we once did), I don't think that is anything to brag about nor a good reason to teach other people to never expect anything *real* from God!
I can't say I agree with much of what I hear Crowder and Co. are doing. But some of us aren't really given much of a choice whether we are going to experience God or not, He just kind of forces this stuff upon us! The only choice we have is to either walk the path He places before us, or abandon the thought of walking through life with Him and give in to the fears so many have -- that everything experiential in nature is of the Devil, and only those who serve God purely from their intellect are the ones who are the *True* Christians.
Perhaps in your response here lies an important distinction. What Crowder and the new mystics are promoting is the pursuit of mysticism for the sake of the experience - in other words, chasing after manifestations. If we are faithful with God's Word and walking in His Will for our lives in ministry and entering into prayer and worship faithfully and honestly, we will have some mystical experiences as part and parcel of that walk with the Lord. I'll be worshipping the Lord in song and suddenly see things in a vision form that reveal things of Heaven. I view these experiences as a tremendous blessing and can barely speak of them because they always seem to trigger an overwhelming sense of God's Presence and I just get too emotional to relate the experience very well when I've occasionally decided to share something with someone close to me about it. It does recall Paul's description of his experiences and explains why he doesn't write about them so as not to brag about revelations and experiences . . . where would it end?
The problem I see with where Crowder, Bentley et al are is that they are deliberately pursuing these experiences which then become a form of idolatry. We're not called to pursue experiences. We're called to follow after and obey Jesus Christ. Jesus didn't do around talking about his mystical experiences and imploring people to experience them with him. Just the opposite, he went off on to the mountain side to pray in private. Or when needed, like at the transfiguration, he brought only a few of his inner circle friends to be with him and witness the event to record it for Scripture. But he then didn't go around telling the crowds how he just met with Moses and Elijah so everyone has to follow him and he'll show them how to do it . . . ala Bentley, Bob Jones and Crowder. If we do things pursuing and inviting spiritual experiences for the sake of experience, I will tell you that God doesn't respond to that kind of activity or request, but there are plenty of evil spirits out there ready to accommodate. It's easy for them to appear as angels of light, masquerade as deceased saints to talk to, carry us off in out of body experiences we misinterpret as visions of heaven, etc.
While Crowder and his ilk will quickly point out is how some of these experiences were legitimate things that happened to genuine Christians who completely separated themselves from this world and lived their lives unto God, often cloistering themselves in convents and monasteries and spending their lives in intercessory prayer or ministry to the poor non-stop day and night. They didn't pursue these things, it just happened as they chased after God and His will for their lives. When Crowder comes along and tries to follow after them by snorting lines off of their graves, it's like some carnival version of Christian mysticism - let's see how wacky we can act and excuse it by comparing it to the rare and isolated experiences of serious, sacrificial Christians.
It's important to understand the distinction I've made here. We should never pray to encounter an angel, but it may happen as we operate in our calling to preach, teach, heal, serve, etc. We should never ask God for a visit to Heaven so we can see secret things, but it may happen as we obey His calling to intercede for others, to pray for wisdom to lead His Church, etc. One should never try to be a mystic, it should always be the by-product of our walk and initiated by God Himself. And then our job should be to follow Paul's example, never boast about them or go around teaching others how to force these things to happen, or formulate doctrine around the experience itself understanding that we may not be fully understanding all that we should based on a spiritual experience.
I've encountered more than one pastor who had some of the revival manifestations break out in their church (feathers, dust, gems, etc) - some of which they weren't sure about. These were very spiritually healthy churches that really are quite charismatic and dynamic and always have been - we don't need to be revived when we never died to begin with. Anyway, these pastors were willing to welcome the manifestations if they were of God, so they stopped and prayed, 'God, if this is You, we welcome it, but if not, may it stop here and now'. In each case, these were private prayers, not shared from the pulpit, and the manifestations literally stopped immediately. Some revival groupies, who probably brought the manifestations in with them, left the churches interpreting what happened as God's disapproval. But the Pastors were relieved knowing it was God that it stopped. I believe they saved their churches from this apostate path of chasing after demonic manifestations.