I never liked them, but I never touched their dragon, but they wont talk to me except to threaten me, ME!, the Dovahkiin! Bunch of crazy zealots.

Anyway, why are they pissed about their dragon when he is still sitting up on his word wall?

I'm not understanding the full situation. What is going on? I get that the Greybeards won't talk because of a certain dragon, but what lead up to all this?

Because of a bug, from the sound of it.

They should only not talk to you if you killed Paarthurnax.

Well Arngeir will will talk to you, but he'll be pissed at you.