What culture is that?

Everyone is angry right now. Really, it's not you, it is endemic to our culture as you say. The middle finger became standard communication a couple decades ago. Not too long ago, if you called someone on their driving, you'd have more apologetic looks and less back talk. Now, you risk your personal safety. Rage can be ignited with a comment.

It is emotional and a sign of mental health issues.
You need counselling, exercise, meditation, yoga.
Whatever helps but don’t blame this on anyone else.

Just kidding. I’m also from a cultural background where we’re known for having a quick temper. We also laugh and sing a lot, so it’s not all bad. : ).

Understanding why can be helpful, but there isn't always an answer. More importantly I hope you have a healthy outlet. Learn to kickbox, etc.

The English and French have what it called the “short form” gene that produces less serotonin. I'm sure that plays a role in how Canadians have been socialized for 160 years.

... Is not a sign of mental health issuez. The issue is the right amount of anger at the right person at the right time. So says Aristotle. Moderation is key.

And by "we" I mean people who grew up in a "traditional" culture where the children were forbidden to give opinions (indeed, were not even permitted to show displeasure with adult directions), and where the teaching method involved much yelling and smacking.

These methods yield a superficially compliant youth, who grows up to be a testy, physical adult.

If this is you, then the anger issue is both normal and not your fault. It is, however, your responsibility to deal with.

Just thinking it through helped me a lot with this rage. I realized that I owed my wife and kids at least the same amount of patience I would give to a random stranger in public, meaning that I just cannot ever be yelling or throwing things around like a monkey.

And we do live in a part of the world rich with therapists and counselling and I find that helps too.