There goes your 'God uses the devil to strengthen you theory'!
1 John 3:8 - He who does what is sinful is of the devil, because the devil has been sinning from the beginning. The reason the Son of God appeared was to destroy the devil's work.
There is a war going on and there is a message; if only most christians knew Christ. The truth and simply being real should trample 'churchianity'.