If anything the skew within the platforms is to prioritize pro-palestinian views https://twitter.com/committeeonccp/status/173279243496103143...
It also seems like these platforms create (rather than support) anti-Israeli views: https://twitter.com/antgoldbloom/status/1730255552738201854
US views skew pro-israel, and GenZ is closer to 50/50, so if there's something going on online, it's not in favor of Israel.
It's probably relevant that there are 1 billion Muslims to 16 million Jews, and that the largest relevant population of pro-Israeli internationals is India and Indian Hindus, and they are not on TikTok (blocked in India).
But conflating anti-Israeli views with anti-Semitic views does a disservice to Jews and Palestinians alike.
But chants like "from the river to the sea" (meaning destroying Jewish country) and calls for an intifada (de facto violence against Jews) are anti-semitic. Supporting Hamas, whose goal is to kill as many Jews as possible, or saying Israel shouldn't defend itself against Hamas attacks is anti-semitic (Hamas is also bad for Gazans, but that's another story). I can go on and on. People holding these views may hold them not because they hate Jews (for example, I don't think that people removing posters of kidnapped Israelis necessarily hate them), but the result is all the same. There is also obvious anti-semitism unrelated to Israel, like attacking synagogues, drawing stars of David on Jewish houses, etc., but that's not what I'm talking about.
And the most vocal anti-Israelis are naturally the most extreme ones and usually include some of the stuff I mentioned. As a result, people call out anti-semitism, usually not referring to anti-Israeli critics you are talking about.
> https://www.timesofisrael.com/for-years-netanyahu-propped-up...
Then the Times of Israel is on the record with articles accusing Netanyahu of being anti-semitic. I don't think those things you list are anti-semitic - they just happen to be politically bad for Jews right now. There is a difference (an important one) between policies-bad-for-a-group and being motivated by an unreasonable hatred of a group.
https://www.haaretz.com/world-news/2018-12-13/ty-article-opi...