An honest attempt at a reasonable/civil answer:

I think being a "sanctuary" community has little to do with whether or how immigration laws should be enforced. What is critically important is that these communities are already here. While they are here, they need to feel they can trust the local government and the local police to address local issues.

If someone who is "mexican" looking gets assulted in this county, I 100% want them to report that to police and I want them to get medical attention from EMTs or HoCoGeneral. I don't want Police, EMTs, or Doctors trying to call ICE on someone they are supposed to be helping because that person speaks spanish or whatever. And this isn't just illegals, this impacts people who live near them or are friends with them, or legals who don't speak good english and are scared of getting into expensive court trouble despite their having legal status. It happens. All. the. time.

And you shouldn't want that either. The reason "sanctuary communities" exist is because having local police indistingiuishable from ICE means that policing effectively doesn't exist for this huge swath of people. What happens when you have no police? Anarchy, every police loving conservative should know that.

AND "sanctuary" doesn't prevent ICE from doing their job. And if there is other crime (drugs, human trafficking, etc) mixed up with illegals then you can bet local PD will be all over it anyway.

tl;dr Let the PD work for the people who are living here (no matter where they are from) and let ICE worry about whether those people are allowed to live here or not.