>The only reason why the US is so extremely lax on firearms is because people keep blathering on about how guns are the last line of defense against a tyrannical government

No, it’s because the right to own firearms is very explicitly stated in our constitution and the constitution requires an extreme super majority to update. A 50%+1 majority is all that’s required to ban civilian ownership of guns in most parliamentary systems, not so in the US. The culture is downstream of the law.

> Vote in a literal tyrant.

Tyrant? You may disagree with him, but he got in through the system. Now if he doesn't get out that is another story.

No part of Europe has “simply banned guns”. Some countries have stricter policies but it’s possibly to own a gun in every country. Some countries are famous for gun ownership, eg switzerland that expects men to keep their militarily issued gun in the home.