I think it's pretty serious.
It's just like any problem... the first step to fixing a problem is admitting there *is* one. We will never be able to start getting past these social issues both individually and world wide until it's acknowledged, accepted, and embraced as an issue. Like I tell my kids... Putting your head in the sand will only get you dirt in your ears...
Ok, that's hokey, but I'm sure you understand the point. :)
As far as people denying the Jewish holocaust? I can't even wrap my brain around that one. Again... there is a great lesson to be learned from these events, if only people remember and accept the truth about it. History class isn't just for sleeping anymore, you actually might learn something about yourself through the stories of others...