Only if it happens in front of them, over and over again. Otherwise, they will explain it away.
Only if it happens TO them and it may take more than once.
I had no idea how hostile the left are until I made a negative remark on FaceBook about Hillary. Then it got shifted to a site called “Madam President” and I really got blasted. Before I realized that they do not possess common sense I posted some undisputed facts and they called me an idiot and liar. These are evil people. Trying to get the truth to them is impossible.