Maybe Sweden is different from every other country I’ve visited in Europe…but having traveled quite extensively in the EU, most countries I’ve been to don’t feel much different than the US.

Very immigration officer I’ve ever interacted with has been chilly, it’s not some uniquely American thing.

Pretty much every rail station I went through in Europe had extremely (to my eyes) heavily armed guards standing around. I was also asked to present my passport on several occasions. At one Italian station, it happed twice within a few minutes. I’ve been on multiple trains where some flavor of police comes on, checks people’s papers, and then grab some guy and escort him off at the next stop.

I don't mind the stern-looking armed security or immigration officers, it just feels different in the USA. Being chilly is different than being told to "move", I have never experienced such attitude getting into Schengen, at most it's a mostly quiet stern encounter.

It's very hard to express in text the feeling of oppression, it's not about just armed security, it's the attitude of those, it's the attitude of the people representing the State, it feels much more adversarial in the USA than anywhere I've been in Europe.

Also, it's not about being asked to present a passport but presenting a legitimate passport and being met with "you don't look Swedish".

Perhaps you are just too accustomed to the feeling of the USA, as an outsider it does feel different, and way more oppressive.