Why are they bringing their children into harms way in the first place? Is it our job to help anyone? If so then where does it say that? Do not conflate your mindless altruism with libertarianism and anarchy.
No one has an obligation to take anyone in if they don't want to. Perhaps we should all teach those migrants to stop voting for shitty politicians that fuck their country up so they won't have to come here. There is a mexican town called Cheran and they're living in complete peace ever since they stopped participating in elections. What the state did was purely reactionary in response to rock throwing as you can see in this video with the battle with mexican authorities:
So do i like the state for shooting tear gas? No. But even if there wasn't a state, then the migrants would clash with the locals that were in the towns that the migrants were destroying. The locals' response would resemble that of the state's response if they had guns or crowd control equipment. And before you call me gullible, remember to yourself that you're believing what left leaning mainstream media tells you. They tap into your emotions all the time by trying to make it seem as if the situation is way worse than what it really is and by using imagery. and you keep believing them. I'm looking at video evidence of these violent caravans and if you're not taking that into account, then you're in denial.
"But even if there wasn't a state, then the migrants would clash with the locals that were in the towns that the migrants were destroying"
If the state did not exist private property owners could mow them down with machine guns. There is no right to trespass onto private property. A privatized anarcho-capitalist country (or region/zone) would not have "open borders," it would have private property borders, and property owners, including groups of property owners working together, could use violence to defend their property borders against trespassers/invaders.
"If the state did not exist private property owners could mow them down with machine guns."
Just to clarify before anyone freaks out, I was engaging in a bit of hyperbole here. Property owners in an anarcho-capitalist society should of course try to ward them off with fences or walls or tear gas or some other non-lethal means first, but of course if that does not work and the situation escalates, deadly force to defend property rights could become necessary.