You are right about stupid people falling for stupid shit, but that's not why democrats lost. Trump got less votes than he did in 2020, that 70 million who voted for Trump are just people who love what Trump says.
What made democrats lose are the 16 million votes Biden got that Harris didn't get. The GOP didn't magically make those votes disappear, those missing votes is the failure of the democratic party.
In general I agree, because their campaign definitely could've been better and it should've been better. But on the other hand this election wasn't genocide or no genocide, without a significant shift in either political party that would happen regardless. If you really wanted to twist it into "genocide or no genocide" then that vote was "completely support genocide" or "begrudgingly support genocide".
But really this election was between "full steam straight into fascism" and "chance to not go into fascism". It's obvious that if you don't vote for the latter you either want fascism or don't care that you're getting fascism. That is on the voters. They could've voted to pass the fascism buck to the next election, but they didn't. Now America is getting fascism.