It's not okay to tear-gas children, even if you think their parents were using them as "human shields."
It's not okay to tear-gas children, even if their parents are disobeying the commands of a ruling class.
It's not okay to tear-gas children, even if some other politician in a different political party did it before.
For those of you who believe in authoritarian political "borders," would you be okay with a foreign "government" assaulting people inside the U.S.? Or is it only your ruling class that is allowed to intentionally attack civilians when they are in foreign countries?
Did I mention that it's not okay to tear-gas children?
If you try to justify tear-gassing children, you might be an evil piece of shit.
If you think Trump and his mindless order-followers wouldn't also tear-gas you (or do far worse to you), the moment you disobey some edict of his, then you're an idiot.
More generally, if you think the violence of the state is ever used to protect or serve you, you're a gullible twit. You are livestock to your rulers, even when you pathetically cheer for them.