Are they really? Or have MS's astroturfing campaigns successfully resulted in the perception of this being the case? I don't know, but I do know that the original anti-MS stance wasn't so much about MS specifically, but was targetted against any monopolistic behaviour. So it would make sense that today it's FAAG who gets the flak.
I think because young developers believe Microsoft has changed.
Their bullshit radar seems to be broken.
They lack a proper frame of reference, being born too late to experience a pre-Windows world.