If they are yelling it’s emotional. The idea of an echo chamber within community is very real. I’ve been exposed to many of them and though they are indeed community they commonly end up with the lot of agreement over the same ideas. Not a bad thing but certainly off putting to those coming in with contrary points of view. All religion tends to end up in such a place. Small discrepancies of view over minor issues but the core tenets are all agreed upon. To be in the community it requires this agreement. It’s neither good or bad, it’s simply insular.