Perhaps you are unfamiliar with how cranky Sir Isaac Newton was when it came to discussions of "his" calculus. Without getting into any defense of João, I wouldn't write him off merely because he was a bit testy, especially where it concerned the journal Nature.
--Boot Hill
There's no denying that Newton was a real prick. But he could still get his ideas accepted by people (some slower than others, of course). That's different from the cranks who can't find *any* professional acceptance for their ideas and then go on rants about how they're being "kept down by the Man", so to speak.