Why are metalheads so arrogant?

They think they are "superior" to everyone because they listen to metal, they think metal is "superior" to all genres and if you don't listen to metal then according to them you're a "dumb sheep who listens to Justin Bieber".

Metalheads are very critical of Electronic Dance Music and say bad things about EDM and because they listen to metal they think they are the "experts" on music and they think they have the authority to decide what is "real" music and what is not "real" music.

Lastly they like to associate music they don't like with homosexuality i. e "EDM? thats gay".
Why are metalheads so arrogant?
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