Just my thoughts, maybe I'm real wrong, but:

Every candidate will be at minimum slightly different than ones platonic ideal candidate, but a vote for them is still a blanket endorsement of their politics and policies. We cannot vote for someone and say "I only support this aspect of their policies", rather, we can only say "I believe that this aspect of their policies outweighs these other aspects." In this hypothetical case of a government worker, that statement becomes "I believe that my continued employment for the government under this future administration outweighs the continuation of the genocide being committed and inflicted upon Palestinians".

It is important to recognize and grapple with the fact that by existing in the US and participating in the social systems of the US we are contributing to this genocide, some of us in small ways some in large; we must critically consider how we can minimize our contribution and how we can actively work against the states actions. However recognition of our being held hostage like this does not justify explicitly supporting genocide. A vote is an explicit act, and is an endorsement of the politics of the person and party being voted for.