I’ve searched for awhile now but haven’t seen anyone else posting this but appears that the citizens of Tijuana Mexico do not want these migrants in their country either and they’re telling them to leave and go back.
Most countries don't really welcome migrants. Even social democratic countries. There is something about being territorial, or maybe it's something deeper, or a bunch of things together.
It has nothing to do with being territorial but with the number of migrants; no country can deal with 10,000 migrants at once.