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.
10 points
“fucken dumb bullshit for dickheads” as we say in the noble Strayan dialect
5 points
6 points
“Rationalistengeschwurbel” seems like it would work well