Because they found these quotes of these ideologues and forefathers of these people and exposed them to the world and then we saw the ulema warn against these
Hence why the ulema came together and made tabdi' of ikhwan muslimin,
Hence why whosoever praises this man or followed him was labelled by the ulema as a "Qutbi" and he was warned against and made tabdi' of no matter what his level was!
Some readings:
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If you know Arabic go find Shaykh Rabi's books he wrote refuting this man from his own speech