Jothar,
I think that Shlumiel Ben Tzurishadi was Zimri ben Salu, the Nasi who was killed by Pinchas which explains the derogatory use of the name. What does not having his korbon fall out on Shabbos have to do with anything?
I was thinking about the part of your last post that you left out and it reminded me of a story. A young chasidishe boy once said “a gutten Shabbos” to a man and the man answered, “Shabbat Shalom”. The boy responded, “If you don’t speak Yiddish, how will you speak to the Eibishter when you get to Olam Habbah?”