I wonder if Biden would legitimately side with Israel over the UN?

Yes.

It’s insane that’s not an obvious answer,

No, it’s an obvious yes.

See https://apnews.com/article/un-vote-palestinian-membership-us-veto-8d8ad60d8576b5ab9e70d2f8bf7e2881

Also see https://www.theguardian.com/world/2024/oct/14/aysenur-ezgi-eygi-american-turkish-woman-killed-idf-family-demands-justice

Ali said he felt that Biden’s apparent reluctance sends a message
“I feel like the blood is really on the hands of the Biden administration or whoever comes next if we don’t uphold our own laws when US citizens are killed abroad,” she said.

I can’t wait to someday have a president I’m not embarrassed to be associated with.

I wonder how long that wait will be… ):