Patal Aval Assur– though their are mistakes in that list I am partly responsible for putting that list together which somehow got to Frumteens. Also, look up the Maharil in Netzach Yisroel chapter 24 here it is: ??? ????? ???? ?????[?] ????? ?? ???, ?? ?? ?? ??????? ?????, ?? ????? ???? ?? ????? ???? ????, ??? ????? ??? ??????? ???? ??????? ?????? ????? ????. ???? ??? ??????? ????? ?? ???, ???? ?????? ?? ???? ???????? ????, ???? ?????? ????? ?? ???. ??? ????, ???? ?? ??? ???? ??? ?????? ??? ????. ???? ?? ????, ?? ????? ‘????? ?? ???’ ????? ???? ???? ????? ?? ???, ???? ?????? ?? ???? ?? ???, ?????? ??? ????? ???? ??? ???? ????? ?????. ?? ???? ?? ???, ?? ?? ?? ????? ??? ????? ?????, ?? ??? ?????. ???? ????? ‘????? ?? ???’, ???? ???? ?? ?? ???? ????? ????? ???? ?????? ???, ?? ???? ?????? ??? ???? ????? ???. ??? ?????? ??? ?? ??? ????, ??? ????? ??:
He says that what must keep the Shevuos L’halacha even under threat for life (i.e it is Yaahareh vaal yaavor)
I agree that the rashbash says there is a Mitzvah on the individual of Yishuv E’y but he does hold of the issur of Ya’aleh K’choma. The Rambam you quoted shows the Rambam warning us of the terrible consequences that will happen from violating the Shevuos obviously even if he holds they are not Halacha (which is not pashut) still he holds they are a terribe idea.