If you are a christian/muslim/buddha/hindu/jew/ aethist/agnostic etc.practice it within the confines of your faith without extremism.That's what people are up against.
Don't profess something and do exactly the opposite cz the same belief condemns/admonishes you.It's not the people.Don't blame people.
I for instance cannot admonish a muslim/buddhist for not living a Christian life and vice versa.
An atheist has no ground to speak/argue about religion.It doesn't exist so it can't form any basis in an argument.
If this guy regards himself as a christian and an end time prophet,all I need to do is refer to the bible he preaches and qualify him as one.
If his actions and teachings fail to match the biblical description of a prophet, I simply dismiss him as false.
As a believer the same bible commands me to test them spirits and prophets.So I am within my legal limits as a christian to admonish liars.
If he doesn't want to be referred to as a false prophet let him ditch the bible or Christianity. No one will blink.
"The true measure of a man is how he treats someone who can do him absolutely no good.