Donald Trump on Saturday said you can’t “teach a criminal not to be a criminal,” leading to widespread mockery online. Trump at his rally over the weekend used the line about criminals in connection with his stated plans for a “mass deportation” if he were to win the presidency again. “You’re not going to teach a criminal not to be a criminal, not going to happen. You don’t have the time and you don’t have the energy because you have to do other things,” Trump said at the Michigan rally. “That is why, as soon as I take the oath of office, we will begin the largest deportation operation in the …