Doubt it makes a difference.
Although I still don't understand Biden's loyalty to Israel. Not only is it unethical, but it's a political liability, hurts his reelection chances and will stain his legacy. Not to mention Netanyahu is a Trump ally anyway. Hopefully the AIPAC money is worth it...
Would hurt his re-election chances if he condemned them too though.
An American president turning his back on Israel, arguably the US' biggest ally, after they were the subject of an attack from an Islamic terror group? They don't have the right to defend themselves from that?
The above is exactly how it would get spun if he was anti-Israel. It's one of those situations where the incumbent is fukked either way. It's funny how it'll put off a lot of liberals for voting him though considering it would essentially be a vote for a dude who is also anti-Palestine and wants to ban Muslims from entering the fukking country Go figure.