For 40 years or more we have followed the advice of voting for the lesser of two evils and look where it has brought us. Liberals are liberals no matter what uniform they wear.
What the GOP needs to do is have a consistent philosophy. The dems are the party of abortion. Fine. Let them be. We shouldn't try to be both pro life and pro abortion and we certainly can't expect to win consistently if we fight each other from within.
The dems are a coalition of various interests that don't conflict with each other. They vary only in the priority of which group's agenda gets advanced. We, OTOH, try to be all things to all people. We take both sides of every issue and then are surprised when a pro life voter refuses to vote for a pro abortion candidate; when a pro gun voter won't take one for the team and vote for a gun grabber; when a fiscal conservative withholds his vote from a 'compassionate conservative' who wants to spend our tax money to buy his reelection.
Values voters don't vote for the team when the team doesn't support our values. It's really just that simple. The GOP can position itself to win for generations to come but they can't do it by standing for nothing and expecting it's voters to vote against their interests for the sake of the Party.