Why do people hate Nickelback so much? What makes them different from other popular bands like Linkin Park, Green Day, etc.? Is it just because they're Canadian or what?

NickelBack.

I doubt many hate them for being Canadian. I was going to say no one, but never say never , so to speak.

There will always be that one guy or gal. They may have friends also, so opinions spread, growing in strength , spreading yet further until the humble opinion of one becomes a near fact to many.

Why do entitled people demand that I pick up after my doggo when he goes to the bathroom? Do they not know that doggy doo decomposes & feeds the plants?

Canadians are generally likeable people , so NickleBack are most likely ok guys.

Even I have cracked a few jokes about the band but I did so not intending any ill will or malice toward the band. Going with the flow at the moment I believe as NickleBack was the topic of the moment.

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Why does it seem that Quora's "moderators" base their moderations on personal beliefs and views by deleting answers that are only violating their personal feelings?

NickleBack may appeal to many, but the majority rules as the saying goes and the overwhelming majority of more vocal proponents voice the opinion the music is bland, generic and commercial, not necessarily in any particular order.

Those opposed to the band are simply louder and more vocal than the true fans. A matter of opinions.

Anyway, why are they so despised in comparison to Green Day, Linkin Park, etc ?? To use an analogy, it is like comparing the smoking/stoner crowd in high school, the athletes and finally the unpopular souls.

It is common sense that Joe Biden is ruining America and is unfit to be president, but why are the liberals still supporting him when Trump is obviously a much better fit for office?