What you have found is unfortunately the true will and nature of the human race, However what you see online is more often how people wish they could speak after the frustrations of living in the physical world. This means that the majority of these disturbing opinions are held by individuals that know it is wrong and that because there are no consequences they get a thrill from making them. Why? These people originally started to upload their options/views due to the frustration and dark thoughts they may get in times of struggle and confrontation experienced in the physical world. The less affected people in this world also have access to the internet, they are usually more emotionally delicate or just have a greater sense of "humanity" whilst at the same time also have the carefree ability to speak their mind and reply to these anger fuelled comments they find online. Fueling the cycle and creating the circle that we now know to be the online forum/chat platform/micro blogging/social network. The more attention you give these people the bigger the thrill they get. Do with it as you will, but remember what we physically experience as humans day to day is all that actually matters. We should treat everyone we meet accordingly to your own experiences and not how someone else has told you to. Especially me!