I have not seen many leftists not agree that both votes are for genocide - that’s just a given.
But protesting the system during the election is daft. Do you want genocide, or more genocide? You are not a slave to the system if you vote and then actually do something about it to change it.
Ignoring the current system is plain ignorance. Voting doesn’t make you a slave. Voting and giving up makes you a slave. How about vote and campaign for change instead. Despair does not lead to change.
Vote this election then. And then campaign after the election. What’s stopping you from being the change later? Why teach the a lesson now, when the alternative is Drumpf?