Learning Nach or dikduk in Slabodka

Ishim Veshitos writes that it was "illegal" to learn Nach or dikduk in the yeshiva in Slabodka due to Masilic concerns.

Josh Waxman notes that this is an example that a certain yeshiva's approach does not necessarily have to be in line define the overall "Torah True" approach (whatever that means).

He fails to highlight the very real issue that yeshiva faced which caused the shunning. Ask any Slabodka yeshiva graduate; he will no doubt have no issue with the learning of these subjects per se, only the effect they sometimes caused at that time.

It is a good example of a hahagah which some might later interpret incorrectly, resulting in incorrect values, a total different issue. (Unless that was what Josh meant.)