The border issue is definitely not black and white and I admit that I struggle with this issue despite being an anarchist. I understand borders for what they are: imaginary lines drawn in the sand by a fictitious corporation that is masquerading as a country and nation, which makes borders utterly meaningless and just another part of the mechanized pretending we do as part of this mandatory slave society we live in.
So supporting it is acknowledging and legitimizing the State and this fiction we are surrounded by, not to mention any additional government cost is automatically going to add to the amount of theft through taxation that they are going to take from hard working people to support this border.
However, I also fully understand why people would support having a border which protects and encapsulates this area as the US and that is viewed as a part of who they are. Their own identity is tied up with the national identity (for better or for worse), as well as viewing the people coming in as trespassing into this country, taking jobs away from Americans, adding additional burdens onto the welfare systems which in turn creates more theft in form of tax increases. Also if they are allowed to vote, these people that participate in voting, would view it as they get less of a say. From that perspective I can understand (but not support) their gripes.
Is this a damned if you do, damned if you don't situation?
What I want to figure out is what is making their own countries so bad that they are considering leaving, taking the trek, endangering their children, etc for the hope of a better life. Is what is happening there so un-fixable that this is their only option?
Governments make their lives at home miserable. The only way to fix it is to abolish the government, but-- like Americans-- they believe that would be a mistake and make things worse. LOL.
I would love to see that happen and will work a peaceful transition away from government... then again maybe we should try government ONE more time... what do you say? LOL.
I don't necessarily believe that 5,000+ years of unrelenting failure absolutely guarantees the next attempt will be a failure too. How long did people try to fly before they figured it out? But, figuring out how to fly involved new technology and scientific discoveries. Every "new" attempt to govern tries the same old superstitions and smoke & mirror tricks. No new discoveries. Plus, governing others will always stay unethical, no matter how it is done.