8 points
*
I feel like you would use an extended modifier instead: Die kindische und katastrophale von Rationalisten gebrauchte Sprache. Or maybe something like “die kindische und katastrophale Rationalistensprache”. Not sure though. This is pushing the limits of my B1 German though.
6 points
“Rationalistengeschwurbel” seems like it would work well
10 points
“fucken dumb bullshit for dickheads” as we say in the noble Strayan dialect
5 points