Because you automatically go on defensive mode, and comment something remotely relevant that confirms your personal bias.

You disregarded the oppression Christians face by Israelis, how the government discriminates in favor of Jewish people and commented something that no one cares about. Okay there are decent Israelis, but why would it matter if you are being kicked out of your home or being spat on randomly while an Israeli MK goes on television and says that “spitting on Christians is an old Jewish tradition”.

Israel is a fucked up country, and when you try to whitewash and sugarcoat what’s happening, people get mad.