Do you call the way The Prophet called?
Normally, one need to be confused to accept what one is ignorant of.
And to confuse sometime needs argument. But it should be in polite and reasonable manner.
We don't need to deny anybody his/her right accorded by Islam in the name of correcting.
When correcting, don't forget you are calling to Allah's way, not your personal belief. You can only get reward for your action from Allah if you purify your mind and make your call in accordance to the way of our Master (SAW).
Paradise and hell belong to Allah not you. From His Rahma, He can bless your assumed enemy with it.
Correct your way of correcting!
Do you call the way The Prophet called?