I’m absolutely fine with the Hetalia fandom being political. What upsets me greatly is fans who headcanon characters as having their same political views and treat those hcs as canon, shaming the fans who think differently and make the characters act according to a different political view (for instance I remember a fight among a few fans because someone depicted England as being positive about Brexit that day and some people were like ‘how u dare not support Remain and depict UK as upset’).

Totally agree. What I was trying to get at is how people
blindly say “agh! Politics!” as a general bandwagon hate comment without really
understanding the meaning of what they’re saying. A series involving political
personifications is obviously going to be political.

Like you said, headcanons are perfectly fine in my opinion
as long as they don’t promote hatred or elicit any violence. Deeming these
headcanons to be canon is an entirely different matter. There’s a level of
maturity when it comes to respecting other people’s interpretations, and not
infringing on them is something this fandom needs to do better. It’s the same
thing as respecting ships (with the exception of the more problematic ones).

Getting offended by an opinion just because it differs from
yours makes you immature. However, politely engaging with the person, stating
your reasons why you disagree, and accepting that their opinion may differ from yours regardless is what a decent person would do.

It’s impossible to please and agree with everyone. What’s
possible is ignoring the content/ opinions you don’t like. Enjoy the things you
like and respect that what other people like may not fall in line with your
interests.

Don’t be petty. Simple.