Nonsense. He wasn't radicalized at all.
He is just a mass murderer of the type that shoot up schools and movies in America.
Why was there an attempted coup in Turkey?
Why? Because Erdogan wanted one.
it gives him a chance to get rid of all who disagree with him.
If you don't think he staged this: please explain how he just happened to have a list of 2700 judges to arrest sitting in his pocket?
Why Is A Cleric In The Poconos Accused Of Fomenting Turkey's Coup Attempt?
Because he has disagreed with Erdogan, and anyone who does not support Erdogan 100% is viewed as a subversive revolutionary who should be arrested and, preferably, executed.