Actually not. Do you do everything your culture says ? Do you like the gay people in your country ? If you don't like your gay people then why are you there ? So, he should move from his country because he dislikes to go and watch anime in a theater with some bunch of kids.
That analogy does not even make sense.
Your analogy makes me question your attitudes towards gay people. As you know the supreme court has made it legal that people have the right to marry whoever they want.
To even mention that you would consider moving to another country based on the rights given to gay people gives me the chills.
The reason you are acting this way is because this is how you were rasied, to hate people who are unlike you.
You are a big hypocrite. You join an anime forum and say "it's socially awkward to go watch it."
What ever you do is your decision since you live in a free country.
But what is not right is just watching the movie without contributing to it. I would just suggest that you should buy the ticket and not go, thus by doing so you are supporting naruto. I know you enjoy naruto or else you would not be here in this discussion page.
It would be awesome of you to do that, but I know you wouldn't because it would hurt your ego.