I don't get why some people think "you are causing [insert group of people here] to die because you support/vote for [insert thing here]" is going to dissuade anyone of anything. I am indirectly responsible for at least 100 deaths that I know of. I don't lose any sleep over it whatsoever because they were Salafist terrorists, i.e. people I hate. If I hate you, I don't care that voting for and supporting my own interests causes you to die. In fact, if it does, so much the better. Sorry not sorry.
Discussion
The issue isn't really about you directly harming certain people. The issue is that whenever you vote, you are effectively upholding a system i.e the government, by giving them powers that you do not have yourself.
For instance, you don't have the right to murder, steal from, or enslave people. But using the power of the ballot box, you authorize the government to perform actions on your behalf, like murder through war and the death penalty, theft through civil asset forfeiture and taxation, and slavery through the Selective Service and prison labor.
Saying you support a candidate is one thing, but granting them an authority that is used is hurt people is a whole new level.