salam,
Just from a quick glance, there is definitely some distortion and taking things out of context there. For example, Maulana Zakariyyah was merely trying to say that in order to interpret the Qur'an, one needs to master those 15 sciences, not that one should not try to read the Qur'an with understanding. Additionally, no one claimed that Rasulullah

learn urdu at Deoband (an Allah's refuge is sought); this was just a dream that someone related.
However, some of the strange stories mentioned are probably found in those books; books of sufis are replete with strange incidences, which although you may believe to be karamaat, I feel that they are mostly khurafat.
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