There is NO plan in place for what you want.  Even if some mo*ron comes up with your plan, how do you "keep these American Terrorist in their own states"?  It can't be done legally and nobody knows who they are.  Then you want to "vet people that have religious connections to these known American Terrorist (Christianity for example) " - well, 71% of Americans are Christians which is around 210 million people and that is not a "manageable number".  Then you say "known American Terrorist" - who are they?   Your ideas are full of holes and is totally ridiculous.  

Nobody can identify every "American terrorist" no matter what kind of "vetting" they do.