Ah, so your POV comes from ancient hate. Got it!
Not unusual, I know a Scot who is murderously upset about things that happened 400 years ago.
The tensions are ongoing and the threats. What stops us from doing what Israeli and Palestinians are doing is that all of us are Nato members and currently allies. However, if a big war breaks out all bets are off. You have to be born into it to understand. As an outsider there are no good or bad guys for you. You just pick a side to support. For us, the good guys are our people. It’s just the way things are.