The nest wau I've found to handle the triggered swj is let them talk. They will invariably say something that you can get them to hang themselves.
Being PC isn't difficult: just use the common courtesy your parents or church taught you. If you come across an SJW that fails this common courtesy, it easy to difuse their rant. Take the standard holding the door open for a feminist. You may have heard about the rant. Ive never experienced it, but if I did, my response can be said simply without yelling. 'I always hold the door for people behind me. If I didn't hold it for you, it would mean I thought of you as not being a real people.'
But that's me.