there are many, many phonies who claim to be "christian" but aren't. when you delve into their beliefs, you find that they bash GOD's word, the holy bible, support false junk like new-age junk, urantia/phony journals junk, chrislam junk, transhumanism, false doctrines, etc.....

and there are those who outright reject the free gift of salvation that is ONLY through Jesus, GOD's only begotten son and his finished work of the cross.

They are the ones "left behind" after the rapture/resurrection Event. and although many will come to a saving knowledge of Christ after the event, they will have to go through the tribulation period. They will have to choose to either take satan/aton's mark of the beast or reject it.

DO NOT TAKE THE MARK.