Mexico has offered the "refugee's" work permits and housing. Only 100 or so took advantage of it. Their intent is not to escape their country, but to make the political point that their handlers have paid them for.
Reference a prior post where they were being handed money and caught on video.
Edit: I'm sure pressure from Trump caused the action by Mexico to happen.
It's all part of the process so when they get to the border if they ever do, Trump has options.
The international laws of refugee status says you can migrate to the first country that will get you out of the oppression your looking to escape from. You can't keep walking to cherry pick the one you want.
Mexico has made that offer. They don't stand any chance of getting into the US now legally IMHO.
I've seen the post about them being money being given out, chartered buses have now showed up to help transport them. And yes they're being used by some to make a political point but there's also the very real possibility they're being used to effect other changes here, viva reconquista.