Voting according to your conscience is an unconscionable thing to do. Act according to your conscience when there are not bad consequences for other people. A pacifist who allows many people to be murdered because he won't kill is a monster. A voter who votes against Hillary in principle knowing that Trump will abuse millions of Moslems is a monster.
Says Noam Chomskey, political philsopher,
"Voting should not be viewed as a form of personal self-expression or moral judgement directed in retaliation towards major party candidates who fail to reflect our values, or of a corrupt system designed to limit choices to those acceptable to corporate elites. [...]
"[B]y dismissing a “lesser evil” electoral logic and thereby increasing the potential for Clinton’s defeat the left will undermine what should be at the core of what it claims to be attempting to achieve."