Bloody right you should apologise, and thank you for doing so.
Israel is the only majority Jewish country in the world. The only one. Arab countries have a long history of Jew-hate, as do European ones.
Think for a moment of the Jewish friends I mentioned. The husband is Mizrachi, his parents were forced out of a Middle Eastern country with a couple of suitcases, leaving behind most of what they owned. A large part of the wife's family perished in the Holocaust. In their minds, a Jewish state is the most secure place for them.
And now they have DC at university, and we know what university campuses are like for Jews at the moment.
I'm utter appalled at what is going on. There is no excuse for it.