This is intellectually dishonest, and you know it.
You've listed a few isolated cases (without sources, and without context, I might add) where on first glance, it looks like things may have been taken a little too far. Interestingly enough, this is the same logic that pro-gun advocates argue against; that a few isolated incidents are not enough to paint an entire group/movement/whatever in a negative light.
You can't have it both ways.
Either, isolated incidents are indicative of the larger group as a whole, or they are not, and you are simply contradicting your own established logic because it is convenient for you to do so (mostly because it confirms your pre-existing opinions, rather than challenging them.)
Which is it?