Not just "in some communities"; glottal ע is the recognized correct pronunciation. We Ashkenazi are just lazing out with proper pronunciation.
Re:Why Arabic Is Terrific (2011)
by lordgrenville on Thursday June 27, 2019 @04:28AM
(#20292651)
"Recognized correct" in the sense that we guess that's how ancient Hebrew speakers pronounced it, based on Arabic. But we don't really know for sure.
How do you pronounce the ayin?
(Not parent)
Basically "ah-in" or "ah-yin" ("ah" being pronounced like when a doctor tells you "open your mouth and say ah"). It makes the use of that letter much closer to "a" (א or ה in Hebrew).
We don't really involve the deep part of the throat, though I think it's pretty well known that you're "supposed to".
So is a "Hay" (ה) with a Dagesh (usally not written) at the end of a word is pronounced short way back in the throat by Jews who came back to Israel after exile in North Africa (Tunisia, etc.)