I actually listened to a sermon yesterday online. It was from Moriel Ministries with Jacob Prasch. You can read and listen to it
here. It's all about the formation of Christian cults, and I think it would make you think about what you've just asked.
From the standard Christian perspective, what you've just described is no more Christian than Jehovah's Witnesses or Mormons, and these are not even standard Christian cults. There are cults within Christianity (Prasch mentions Kenneth Copeland and Kenneth Hagin as examples of cult leaders who came from within Christianity - and represent examples of those who are really Christian but also veered off into cult status). He does a good run-down of what makes a cult leader, and I think listening to it was beneficial.
(Mind you, I find his site hard to tolerate, since he advocates keeping Torah specifically for the purposes of evangelizing Jews, which I disagree with.)