I am opposed to using military for purely law enforcement missions. They are there to fight and win battles.
If a battle comes on American soil, so be it. I want the military able to fight and win.
B) The type of people who enter the military aren't as authoritarian in nature as police and if the government tried to use the military to abuse people there would be a coup, resulting in the destruction of our current corrupt government and the end of the abomination of Democracy( which our founders never intended but we are more like a true Democracy now) followed by a true conservative military government given the overwhelming number of conservatives in the officier corp.
In that estimate, you are quite incorrect. A military coup would involve such a drastic change from all previous military behavior in this country's history and the Constitution that you would not be able to characterize the ensuing government as "conservative."