Oh I wasn’t accusing anyone of having a minhag that trumps halachah. I just think the clapping one is a tough to understand one kind of like not eating in the Sukkah. I’ve heard the argument for clapping only while dancing on Shabbos like the Chasidim, but that seemed like more of an explanation rather than an actual halachic justification to me if you follow me. I wondered if maybe they consider the dancing and zmiros singing to be their form of a shinui so to speak.
Does the Rema actually fully allow clapping however and whenever? Or, is it more like “if someone claps because they don’t know better, they can rely on this tosafos. If you know better, then you shouldn’t clap.”