I can honestly feel the mountain dwarves' dread.
I mean, getting your beard sacrificed at an Aztelf alter is one thing, but to actually shave it all off... willingly. Voluntarily.

They fear him because his way of thinking may rub off on them and they know it and that thought terrifies them.

Yeah, a 6 foot tall beardless adopted dwarf is one thing, but when you keep grudges instead of grags around, any beardless dwarf is the subject of fear and respect.

I'm just waiting to see the fantasy dwarves reactions to the incoming Leagues of Votann... aka, the new Squats.