PBA: If (completely hypothetically) it could be proven that MBP carries with it serious health risks would you still recognize the rights of those MInhagim?
Certainly.
I suppose at some point it could be clear they were lunatics, like if it killed every time, and we know that bris is not yehareig v’al yaavor. But even your hypothetical does not go that far.
See, this is about the fact that the people doing this have poskim, and have gedolim, and this is what they are being told to do. How can I sit here and decide that their poskim and gedolim are so clearly wrong, on an issue which really is not very clear at all, and indeed is the way bris has been practiced for millennia?
It is very rare for a posek to be that wrong that popa in his throne would be willing to call him obviously wrong. The only example I can think of off the bat, is the ??? ?????, of whom this discussion is about.