I don't think not going to the US is the same thing as boycotting goods from nations you have some ideological problem with. I think it is more about the uneasy feeling you get from visiting a country that makes you feel like you have no rights. (And indeed, at the border crossings you really do not have any rights to speak of).

As for boycotting goods from China: that's not really possible anymore, so it would be a futile exercise. But that's a different discussion.