An ideology that treats women as property that must covered lest it be tainted. That promotes the lying, killing, mutilation and torture in order to convert and kill those that have not submitted to Islam.
You can not tolerate someone that is intolerant because 1 is compromising and the other is not. Therefore if one always compromises and the other never does, eventually there will be only the uncompromising left.
The treasure and majesty of our country and culture is NOT ours to constantly give away piecemeal in an attempt to buy 5 more minutes peace. Appeasement NEVER works and especially will never work with those that are utterly uncompromising in their world view.