This is a red herring. He did not have authority from the elected officials of the state. He put the rock in on his own. Instead of grandstanding, he could have worked through the political system to have them installed. I can't believe all the people here who want a judge to have dictitorial powers.
I agree to a point: we do not need any public official going off the deep end on his own (and yeah, her kinda did). So yes, the state authorities could have stomped on him (they did today, but NOT for States' Rights reasons). If a remember correctly, the Alabama Supreme Court didn't get involved over the monument until the Feds had already done so -- then the issue ceased to become States' Rights, but one of yielding to a Federal Order. Moore believes that order to be unlawful, and I do happen to agree on that isolated point.
Otherwise,... yeah: he did a middle-of-the-night installation of this rock for grandstanding purposes more than for religious purposes, IMHO.