Reply To: how to deal with a guest who brings up Yom Haatzmaut 🇮🇱

Joseph is correct. The Ponovezher Rav zt”l didn’t say tachnun, and set that as the rule in the yeshiva. R’ Shach zt”l was poresh from the entire yeshiva, and he sat down as said tachnun. When he became the Rosh Yeshiva, I believe he changed the minhag there to say tachnun.