Yes, but this quote leaves out the distinction they made. The GP goes on to note the difference caused by who the people in the region support. In real life, as far as I can tell, most people in that region ended up supporting independence or later accession to the US, which seems slightly more similar to the more complex Ukraine situation in the GP comment than Mexico simply wanting Texas back.

Most people in that region (Northern Mexico) were immigrants from the US.

Yeah we pulled that trick in Hawai'i too. Viewed a certain way, the whole nation was built through settler colonialism.

Yes, thanks for clarifying, that’s what I was referring to.