This analogy is wrong. If one of them is to get shot anyways, then the other person won't get shot. Three options:
Person 1 gets shot
Person 2 gets shot
Nobody gets shot
The question is whether you are trying to prevent it or actively endorse a person getting shot. Because if enough people would not endorse it, nobody would get shot.
The ends do not justify the means! That is exactly the logic that the IDF uses. "We just kill all the 2 million Palestinians, and then we can live in safety!". Supporting genocide is not a justifiable way to "save democracy" (whatever that even means).
Vote Cornel West. Vote Jil Stein. Or if the Democrats finally get their head of of their ass and get a Non-Zionist like AOC on there, Vote for them.