Why do liberals seem to quake in their little boots at the mention of Sheriff Joe Arpaio ?

I'm Liberal and I love the guy. He's currently risking his own life to throw illegals out of his jurisdiction. He's not arresting innocent people. He said last night on CNN that his deputies go to high crime areas and 80% of the arrests (robberies, aults etc) made are Mexicans who he then arrests for being illegals.