Momma Bear fandoms

Observing my own and others’ behavior over particular fandoms and associated canons, I had a thought. How many people have a Momma Bear fandom? That is, a canon that you automatically leap to the defense of?

It’s a canon that you love so much the rest of the fandom itself annoys you for not loving it enough. You probably know, deep in your heart, that the story has flaws. As long as you’re assured that you’re among other faithful, you may even discuss them: that this arc should have been paced more briskly or that season really didn’t do justice to Character X. But let an outsider, or even another fan, say the smallest disparaging thing, and you will leap instantly to defend the canon with tooth and claw, possibly out loud or maybe just in your head. After, you may well stalk around in a huff, muttering indignantly over these barbarians who just don’t get the brilliance of your precious canon. In extreme cases, you may even decide that person isn’t worth talking to in the future, because they clearly don’t understand the finer things in life.

So what do you think?  Do many people have this fan-quirk? Do you think it’s widespread, or a small-scale thing? *curious*