You're right, it is more mainstream than just the "woke".
"The abolition of borders is a basic socialist principle" https://catalyst-journal.com/2019/03/the-case-for-open-borde...
https://www.reddit.com/r/Socialism_101/comments/6poltn/whats...
https://www.leftvoice.org/abolish-ice-and-abolish-the-border...
https://www.caldems.com/smart-ass-fall-2020/2020/10/30/recko...
https://socialistworker.co.uk/teach-yourself-marxism/why-rev...
Convinced yet, or shall I go on?