Beating the heck outta this horse
The Sheriff's race is not over. You will get to vote in November. The primary that just occurred was all the Republicans, getting together, and us picking whomever we, as a majority felt, was the best candidate to run in the election in November.
No one is saying that anyone wants to take the rights of a party away. It's not a "Let's choose for the Republicans" issue. What we are saying, from a perspective of Dems, Reps & Indies, is that we'd simply like the partisan BS to be removed from local polls.
I'd vote for a rainbow colored alien from planet Zippo if I thought that s/he could do the best job.

Seriously, I'd have no trouble voting for someone from any party IF I was able to choose the person that I thought was the best. I'm not "stuck" as a die hard anything.
If, like Sunspotbaby & Analogman (almost, I think), I registered as an Independent, I'd feel even more irritated by the system. Both of them are well-educated & thoughtful people who choose not to align with one party or another, yet their vote only counts in the final decision. So, we'll pick Y & Z for you to choose from but you don't have a choice on who the Y & Z are. Yes, it's great on the grander scale of national politics, but not in our little community.