Its one thing to expel Avi Weiss and another to expel a shul. Expelling a shul many times will expel the members of that shul as well. There is no way to know if everyone who goes to HIR feels the same way about such events, they might just go there because they like the davening. However many here are assuming that if HIR is thrown out of the OU, those people will leave and go somewhere else, that might not be the case and people might turn against the OU vs turning on Avi Weiss and it will backfire
One always has to be careful about this, no matter how one feels on a particular issue