Not only that, but if you took them at their word, that donvict and Kamala would have been the eXaCtSaMe on Gaza, then that issue is cancelled out

Not true.

You can refuse to support both of them because they are both evil, and you morally should not support evil. Even if one evil person will put more money in your pocket, or if one person will smile at you while your rights are being eroded while telling you nothing is wrong.