The problem is that beating/ guilting/shaming voters doesn’t work.

You forgot to add gaslighting.

or you can try and convince Democrats that no amount of genocide is acceptable, regardless of the ally committing it.

The problem is that there is absolutely no way of “forcing” the (so-called) “Democratic” party on this through “formal” means - if you vote for them and they win, they will simply know that they can get you to rubber-stamp their complicity in genocide. If you vote for them and they lose or you punish them by not voting and they lose, they still won’t care - they know that four years of Trump will force you back to the ballots to vote for them in four years’ time anyway. In fact, I suspect they are betting on the latter scenario.

You’re being pushed up against a wall - a wall that wouldn’t be there if you actually lived in a democratic society.