Realistically, the US Government is going to continue supporting Israel no matter what happens until the US has meaningful voting reform. Israel is an entrenched interest due to the amount of money changing hands in Washington. (defense contracts, etc.) This is not helped by the social stigma of the average American not differentiating between Israel as a political entity and Jewish people as a demographic. It's one of those "broken by design" social constructs.
The logical fallacy that I largely see in play is the assumption that the Republicans would have handled this any differently. While I agree that Biden's stance is noteworthy, as a reminder that the parties are more alike than they are different on certain topics, it doesn't change the landscape of the two leading presidential candidates. One of them is in bed with Putin and appears to have a vested interest in entrenching himself as a leader who can never lose an election. (i.e. an aspiring president for life) The other candidate is still flawed, but doesn't represent an existential threat to the political institution itself.
I'd much rather have an option other than Trump or Biden, but until more states enact voting reform at a local level we're stuck with a choice of which decrepit old man is least likely to be disruptive to the entire system of government. The Republican party needs to continue its losing streak until it decides the populist authoritarian movement is a failed strategy.