Let’s be clear: the current push behind increasing deportations and targeting sanctuary city policies is rooted in bigotry and misperception. It is based in the notions that American citizenship is a sacred birthright, that illegal immigrants are a drain on resources without contributing anything back to the community, and that a significant number of them are violent criminals. The first notion is a philosophical one, and the line between those who believe it and those who don’t is the line between bigots and opponents of bigotry. The other two notions can be disproven with simple numbers, but really the people who espouse these notions buy into them because they are a comfort to their bigotry.
There is no criminal crisis among illegal immigrants large enough to warrant the punishment of the entire illegal immigrant community with increased, and increasingly violent, deportations. These are human beings who on the whole are contributing members of their local communities, working their asses off to enjoy a better life in the US. I have no more problem with them skirting immigration laws to get here than I have with people using illegal drugs, getting away without paying parking tickets, or any other misdemeanor that is regularly treated with leniency by law enforcement.
As has been pointed out upthread, this effort by the Trump administration will rightfully fail in the courts. Local authorities are under no obligation to do the feds’ job for them.