Chelsea Clinton is a loudmouth who constantly voices her unsolicited and predictably ridiculous Leftist opinions, and therefore deserved all the criticism she ever got, regardless of her age or ugliness.
Baron Trump is a quiet unassuming kid who minds his own business. He should be left alone. Besides, what is there to criticize? From all appearances he is awesome.
She is an adult now, that’s a very different matter. People on FR and elsewhere were trashing her when she was still a child at the White House. People have never left her alone, and it was wrong then, just as it’s wrong now with Barron.