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.
Anti Israeli government: It's not antisemitic.
Anti Israeli people: It's antisemitic.
Criticizing Israeli settlements in the West Bank is not antisemitic. But suggesting that Israel has no right to exist as a Jewish state is antisemitic as it implies ethnic cleansing.
Both are arguably criticisms of the Israeli government.
I've seen very few serious declarations that Israel has no right to exist. I have seen even fewer genuine existential threats to it in the past 2 or 3 decades, and that's not to discount how big of a deal or how sad an event Hamas's attack was.
But I have seen a lot of pro-Israel voices, e.g. at recent Congressional PR-stunt hearings, aggressively question anyone who doesn't bow in deference to their narrative whether they agree Israel has a right to exist. That whole line of tactic is a massive distraction from the question those voices don't want asked, either of themselves or anyone else, which is "do you think Israel has the right to do what it is currently doing to the Palestinians?"