If I was the Devil the main thing I would try to tear down is the Church. Then once I got people divided and not in fellowship with other like minded believers then it would be easy to go after each one individually since they didn't have other Christians to support them and to be accountable to each other.

Get Christians pissed off at each other and not going to Church and in the wilderness alone. Divide and conquer. That's the way I would do it if I was the Devil.

Sounds like my plan is working...