In this case I may well be sabotaging a liberal Republican Party in the state but it's not sabotaging conservatives.
Conservative ideologues don't throw away votes or keep votes. They vote with their conscience. Party doesn't matter. Principle does.
Partisans worry about whose in power and who controls public policy. Ideologues are concerned about the character of public policy.
None of this would matter to Republican partisans except for one small detail. Republicans can't win without the vote of the conservative and the conservative won't vote for the Republican until the Republican implements conservative principles. This usually causes the Republican to have a public hissy.