Technically they could, but it sounds like that law was made to target people of a specific ethic group that he isn't a part of. I doubt it would ever be used against him.
Probably not. But if you're a Hispanic, this law basically says you are a second-class citizen.
I think some of these recent foolish acts have been committed because people are generally getting rather upset with the federal government and its recent policies, and are overcompensating thoughtlessly.