By stating that by "voting for any republican" you are assuming that all of them support these right wing extremists. That is simply not true. When I vote, I look at the person running for office not their political party affiliation.
You are being naive in the extreme. Your view is what empowers the right wing extremists.
Look at the Republican-led Congress. They mostly vote in lockstep. The phrase "Party of No" didn't happen by accident. Congressional Republicans have done the most straight party-line votes in recent years than ever, never seen before to such a degree. Moderates, Conservatives, Teabaggers, they all vote together.
Or else they suffer the consequences of being disloyal to the Party. And they can expect primary challenges that have unseated a number of moderates.
Your view of "looking at the person" that was once valid is obsolete with today's Republican Party. It's now "look at the person, see the Party". That's the reality you're denying.