There are crimes, and there are crimes. And there is not an equal chance of being arrested and convicted of them.
The squealing brats at Harvard and Yale, shouting down conservative speakers, grow up in a bubble. Although I would be willing to bet that nearly 100% of them 'do drugs' of various sorts, they are very unlikely to come into contact with the police-judicial system, for any reason, and if they do, they'll be treated very lightly.
It's different with the working class, of all colors. Young males further down the social scale are much more likely to be arrested -- by their early 20s, about 50% of Black males and 40% of white males have been arrested. (Lefties will scream, "See, it's racism!" Naw, it's behavior, and, anyway, control for social class and see what happens to those stats.) When you hear the word "arrest" you might think of things like "armed robbery" but in most cases it's for drunk driving, bar fights, 'possession', teenage shoplifting ...
Several of my male Texas relatives have been arrested, for the latter sort of crime. (And none of my family there has voted Democrat since 1972.) They're all good people.
So if you tell me someone has been arrested and has pled guilty to a drug offense ... and we're deciding whether we want such a person among us ... I want to know, was he running a meth lab or did he get pulled over for a broken tail-light and then get found with a bag of dope. I want to know about the rest of his life: does he have a job, a family, is he a vet, is this his first conviction or his tenth?
During the occupation of Iraq, several American soldiers were court-martialled and convicted of murder. If you tell me that one of them has now been released and is considering moving into my neighborhood, I will not have a knee-jerk reaction and think, 'How awful!'. I'll want to know more -- was he one of the group who
raped and murdered an Iraqi teenager, or was he
the fellow who sent a probable terrorist to Paradise, one whom was otherwise going to be allowed to return to his trade? If the former, I'd be unhappy, if the latter, I'd organize a welcoming party and see if I could get a whip-round to buy him a car.
But the real issue for conservatives at least, should be: was it a smart move to deport this man? To me, it looks, in Talleyrand's phrase, "worse than a crime, a blunder". One of the many ways in which Mr Trump is working to ensure that the liberals will regain control of Congress and keep it for a long time.