Although it's a fact and will always be with us but it's too bad that anyone would allow their own thoughts and personal revulsion to be manifest in an act of violence to another human being who is not threatening them physically themselves. I'm a strong believer in self defense, but to just assault someone else simply because they may be perceived as different is animalistic and predatory, something one might expect from a lower life form.
Discrimination will always exist, it's not a bad word in and of itself. I discriminate in what I wear, what I eat, where I go, who I hang out with and even who I like and dislike. It's my freedom of choice to like or dislike certain things or even people. But that right doesn't extend to give license to act out on my feelings if it is in any way hurtful to others. Unfortunately those kinds of Neanderthals are still with us and have hurt us all grievously, and it continues on.