This thread is not stupid, it arises from the declarations of Stewart, who knows for sure what he is saying. I really hope MS doesn't get hurt in any way, as much as any other human being...
Now to the MS/Senna issue: I don't think there is a comparison, Senna was a dirty driver when it came down to get what he thought was is place in a race and did too many stupid moves on other drivers along his carreer. The move in the first corner of Suzuka (1991?) against Prost was an homicidal move, completely unacceptable in modern racing, given the approach speed to that turn and the way he just rammed the car against the Ferrari's rear. Same example the same year in Hungary against Naninni to get a podium finish, if I recall correctly... of course that came from a kind of personality disorder that Senna had, that involved statements like seeing God while driving or that it was written that he would be the best.
Schumy doesn't have the same kind of disturbed behaviour, fortunately. His moves on Hill and JV looked more like despair to see titles run away in smoke (and he didn't have at the time that many...). Illegal, of course, but in places where they wouldn't get hurt almost 100% sure.
These days it shows that he has a lot of pressure on him to perform and that he is disappointed because of the lack of pace of his car. But the reasons that gave Ferrari and Bridgestone their dominance (focus on one driver and team, respectively) are the same that make, in the long term, the development suffer...