Capitalism absorbed Christianity because it was dominant at the time it came into being. What Christ said isn’t important, what’s important is that Christianity could provide structures capitalism could latch onto that enabled it to grow and consume everything in its path. If Christ and capitalism are at odds capitalism always wins.
So yes they are incompatible, but at the same time they aren’t. Christianity is exactly what capitalism wants it to be.
This guy wants society to collapse because he saw Fury Road and thought Immortan Joe was the character he was supposed to emulate.
Just tell him there won’t be any electricity or internet or reliable food networks in his fucked up fantasy world to and he’ll change his tune pretty quick. Or maybe not. Maybe his desire for a slave harem outweighs all that.