Is it also delusional to say that Biden is intentionally alienating the people most likely to vote for him?

Of course not. The democrats fully expect anyone on the left to continue supporting them because "what are you gonna do, vote Trump?" The people Biden is most likely to alienate are the people most likely to vote for him, because he has no reason to cater to the demands of safe voters.

Not to mention the fact that he's literally spent his entire career unwaveringly supporting Israel, and all his current actions are totally consistent with full support for Israel and everything it's doing. You know, actual evidence.

You are right to say it's stupid to claim he's doing nothing at all. What he's doing is much, much worse than nothing - he is unconditionally arming a genocide.