Sadly, this is true even within certain styles. Wing Chun is famous for its lineage wars. Want proof? Go look at all the warnings the admins had to give us on the Wing Chun board here. I will admit that I was guilty of it myself: someone disagreed with me on the purpose of Chi Sao, which seemed really far out there (to me), so I said, "What the hell kind of Wing Chun are YOU studying?" I regret it, as it is an example of the same kind of close-minded behavior that I despise so much and fight against.
But I do try, and I succeed more than I fail. I wish it were easier for more people to agree to disagree.
Think about it this way: Person A and Person B have two different religions. Person A thinks their religion is better so, when they hear that Person B thinks THEIRS is better, they take it as a personal insult. They bludgeon Person B over the head with why their religion is better. Person B gets offended and winds up hating Person A.
Why can't we just ask each other questions? Why can't we say "that's interesting, what draws you to that religion?"
Substitute religion with other words: music, books, movies, martial arts, philosophy...whatever. All I know is this: if I ASK instead of judge, then I learn something.
Thomas Carlyle wrote, "Every man is my superior in that I may learn from him." I try to live by that. I try to not act superior to anyone. Everyone has had a different life experience than me, so the odds are they know something I don't.
Actually, let me rephrase that: many of us have similar life experiences. We have more in common than we have different. However, we all live inside our own minds and filter things through our own lenses. Let's say
@Jenna gets cut off in traffic on the way to work. I know how that would make me feel, so I can imagine how it would make her feel...but I cannot really know because she has her OWN lens.
Ask. Listen. Accept the answer as is without arguing how YOUR answer to the same question is better. Gain knowledge.
Why is that so hard?
And why am I rambling on like this? LOL