Best way to talk to lib friends about Taiwan?

Somewhat reddit-brained lib friend of mine sent this article which triggered a whole discussion of geopolitics: https://www.tomshardware.com/tech-industry/tsmcs-euv-machines-are-equipped-with-a-remote-self-destruct-in-case-of-an-invasion

He said that would reduce the chance of an invasion and I was like (paraphrasing): "really? does it? the generations-long and unfinished business of the chinese civil war and all the history there is outweighed by the thought of losing one chip fab that they've already proven they don't really need after all the sanctions? They aren't going to invade unless their hand is forced, there's literally already US troops on taiwan-held islands, if they were on the brink of invading they would have done it already, but they aren't."

He basically argued that the majority of people there wanted to be independent therefore its simple self determination and the US should help them, etc.

I said the no capitalist state gives a flying fuck about self determination and asked if texas has the right to secede, or perhaps more relevantly, if texas settlers had the right to secede from mexico and join the US in the first place? because its not like the nationalists that took over the island were its native inhabitants, who are now mostly dead, flooding a low-population place with "settlers" doesn't mean you own it...

we went back and forth a bunch and he stopped arguing when I pointed out the inconsistency of supporting palestine but also taiwan, when they (while not the same, taiwan wasn't settler colonialism) have kind of a similar arc, what with israel's "majority", both having invaded and largely displacing the prior inhabitants.

I don't feel I had all the best arguments at my disposal, though overall I feel good about my responses.