It's kinda like asking "If blacks are the majority in X state, will they make it part of 'Africa'?" Or "If asians become the majority in X state, will they make it part of 'Asia'?"
Only if your a retard! That is an apple to elephant comparison. First, probably 90-95% of African Americans only identify with one country - America, unlike say Whites. Second, no US state used to be part of Africa. Third no US state borders Africa. Fourth, Blacks are more loyal to this country than most think! They have there gripes and many are just, but the fact remains most only have roots to America and have no idea what African country their roots are from.
Next, we have a majority Asian state - Hawaii. Don't see them trying (even the minority Native Hawaiians in numbers) to become part of say Japan!
Besides, don't you remember what happened last time a state tried to seceed? It's just not gonna happen dude. It's a silly scenario.
That was whites trying to secede, not States trying to become part of another country, in which they could get some international support because of how the Southwest became part of the US!
No man, that is just ridiculous. On your first point, you're talking about "Latin Americans" in general, not just Mexicans as you said. Why would immigrants from Guatemala or Honduras or El Salvador want to become part of Mexico? Central America itself seceeded from Mexico; I don't think they'd be down to re-join it. And as you said, there is an Asian minority state, and they're not trying to join any other country. Why would Mexicans be any different? For all the talk of "oh we're taking California back" not even Mexicans consider it a real possibility. I'd see it way likelier for it to seceed as a new country than trying to join MEXICO of all places.
As for "they could get some international support," that is totally off. There is a name for what you're referring to, it's called IRREDENTISM, and it's basically, universally opposed to by the international community and international law. Sure, the US won it in illegal conquest, but it won it at a time when it was still simply and squarely the rule of the mighty. It doesn't
quite work out that way anymore, and international law is not retroactive.
And as you said, look "that was whites trying to seceed;" and LOOK WHAT HAPPENED. Imagine if MEXICANS did that not only for an independent state but to join the old country? Oh my god, knowing you guys you'd be screaming for the blood of every man, woman, and child in Mexico within a week. You'd pulverize them. It's just not going to happen, not in any forseeable future. I'm talking not within the next 50, 60, or 100 years.