Why battle against faith?
"By faith Abraham, when he was tested, as good as offered up Isaac, and the man that had gladly received the promises attempted to offer up [his] only-begotten [son]," - Hebrews 11:17
As the above text clearly shows, faith can be a very dangerous thing.
Religious people use faith to deny facts, logic, reason and even their basic built-in conscience. Isn't faith the underlying reason why JWs let themselves and their children die rather than accepting lifesaving blood transfusions? Isn't faith the underlying reason why a JW will fight his basic humanity by shunning his own flesh and blood over a changed religious opinion?
A world with religious zealots who value faith above what is demonstrably true and above the basic proddings of conscience, can be a very dangerous place! Even the bible unwittingly acknowledges this:
"In fact, the hour is coming when everyone that kills YOU will imagine he has rendered a sacred service to God" - John 16:2