Read ^^ and learn woman!
How about if you go the grocery store, and want to make a purchase? How do you know if the cashier is a heretic, or not? Do you ask him or her if he or she is a heretic, to make that determination? And then, will you refuse to speak to him or her if he or she is a heretic?
How about family members or neighbors who may be heretics. Do you refuse to speak to them too?