Breaking Shabbos to keep future Shabbos(os)? @DoubleAA I'm not sure what you mean? The proof is that we don't judge by severity but only three specific sins are do not override life by Divine decree.
Breaking Shabbos to keep future Shabbos(os)? @IsaacMoses It's not an exact duplicate, that question is asking about a non-Shabbos observer, this is about an atheist (denies Torah/G-d). There are differences in Halacha.