The idea of corporations being legal people is questionable in the first place, but now you’re going to argue that they’re not only people but citizens?!
I don't disagree. If a corporation has civil rights, they're akin to being a person/entity in which those rights are guaranteed aka citizenship. Some might argue that America is a "corporatocracy" for this very reason.
No, you’ve got weird ideas about citizenship and civil rights if you think that’s the case.
Plenty of rights are conferred by merely being within the borders of a country, regardless of citizenship status. You can be a tourist or even an illegal immigrant in the US and have the right to habeas corpus or the right of non-self-incrimination, for example.
Talking about elevating corporations to be on par with citizens is a fascist idea, which is absolutely adjacent to corporatism.
You can think these ideas are weird, they're not mine, I think a corporation having civil rights is weird too. The infamous line "corporations are people" comes from American politicians, so as weird as it may be, the government itself is inferring it and a court is justifying it as the law of the land.
A key tenet of fascism is protecting corporate interest and power... but okay.