“[My Rav]he holds that IT IS OSSUR to eat these worms…If someone who I considered my rav would rule contrary to the psak of the majority of ??????, I think I would have to get a new rav.”
So if Rav Rav Belsky was your Rav, or if your Rav was any of the vast majority of American poskim who hold that the fish is not treif, you would get rid of him; while most frum Yiden don’t.