That threshold was crossed when Jews took over Israel and displaced the Palestinians from their previous homeland, and the Palestinians didn't just disappear as a cultural identity.
There has never been a legitimate two state solution that would work in the long term. In the end the Palestinians will not be satisfied until the Jews are expelled from Palestine, and shockingly enough, the Jews have no actual interest in leaving. There are plenty of Jews who see the more satisfactory solution being the Palestinians are expelled for the most part from Gaza and the West Bank, with Israeli settlers occupying those lands.
Anything resembling an approach to "long term peace" is actually a temporary ceasefire until people are in charge of one group or the other who resume hostilities.
People decry this mentality as barbarous. Somehow folks want to believe we've moved beyond this as human beings, but we really haven't. We're inured by military strength and the possession of nuclear weapons that can potentially end all life on earth into thinking we're no longer the genocidal maniacs that have been eliminating competing species and fellow human tribes since the dawn of our existence. The world is full of places where the people in power are forcibly removing a cultural identity from the face of the earth with every means at their disposal. Just like we always have.
To me people should pick a side. Either support Palestinians in their efforts to regain Palestine and Jerusalem for their own, and support yet another expulsion of the Jews from Israel. It's been 2000 years. They're probably due. No temple restoration to destroy this time, but you can't have everything. Or support Israel in their right to defend themselves. And since the Palestinians are never going to allow the Jews to peaceably permanently occupy the former Palestinian homelands, that's going to necessitate a broad range of actions that are going to make people very uncomfortable. Blowing up pagers and walkie talkies seems mild to me.
I'm pro Israel. I make no bones about it. I can't defend everything the Jews have done or continue to do there, but either I think they should have a homeland of their own after existing as the most successful minority in history for 2000 years, or I don't. Coming out of WWII and the Holocaust, the Western powers supported it, either tacitly or explicitly. It has helped immeasurably that Jews have found some of their greatest successes as a diaspora in the United States, and have formed arguably the most powerful lobbying group in the country. It also helps that there is an evangelical Christian element that supports Israel for their own reasons, in part because they're rooting for the end of the world and they feel like the reestablishment of the Kingdom of Israel is a harbinger.
In any case, this feels like it's going to continue to get worse, possibly interspersed by interregnums of a sort where we have something resembling peace in the region, even if it's a temporary mirage.