What happens in November is up to Biden – it will not be the fault of the protest voter if Trump is elected. The questions remain: does the Democratic party fear Trump as much as we do? And does it value its voters enough to shift away from an approach to the onslaught in Gaza that a majority of Democratic voters are against?
In the short term, your position is justifiable. But in the long term, it’s anti-democratic. The reasoning you’ve provided here has been used for many elections in the past and can be used forever into the future. But if we’re forced to choose between two bad parties, and there’s never a chance of a third party accomplishing anything good, then nobody will ever represent us.
And if we’re stuck in a non-democracy forever, then it makes sense for people to pursue other more radical solutions. Is that what you want? It’s the natural implication of your message.