Well, we are a United States which means the intention is to lean towards your State over your Fed. Especially since one is your smaller home and has a massive effect on your day to day, whereas the other should be further removed from that. The same way you care about grandma more than Great Aunt.

It was only through constant overreach of the Fed that States lost their identity and power and we became a forced amalgamation of one big nation. Some states however kept more of that identity than others, and that's independent of Left/Right schisms.

If I move to Nevada and I consider Nevada awesome and Texas terrible, am I a traitor to the state of Texas?

Well we are still a United set of States, which means that unless you are taking open action against Texas you aren't actually committing treason. Immigration isn't treason.

Whereas China is a state that is usually constantly acting in a way that is considered malicious towards the US, so supporting them would be traitorous.