Unless your follow-up sentence is “and the revolution is starting now, here’s your kalashnikov,” then the point is moot. Both presidential candidates, and the broader American public, support the genocide in Israel. The only way you’re going to influence any change in that is by tearing down the entire institution.
If you aren’t willing to die in a glorious revolution though, your options are to abstain and hope you don’t give the country to a fascist who wants a genocide at home; or bite your tongue, vote for Biden, and work on grassroots organization to destroy the DNC from within.