Look man, here's the reality. The person making such comments(I'm assuming that it's you, since you're making an effort to defend said comments) is having a personal issue, and people going through real life stress often vent by blaming other people, because they can't handle the stress.
You, or whoever you're talking about, should really start exercising self control. This is a dangerous direction to go in.
The person that these comments were directed at has every right to be upset, however, they should also be aware that these kinds of things happen in a high-stress competitive online game. If you are incapable of handling offensive comments, then you shouldn't be putting yourself in a situation where it is likely to happen.
Riot is doing everything they can to try and clean up the community, and they're doing an absolutely amazing job, considering they are actually taking measures to change peoples personality in mass numbers.
Regardless, the world does not revolve around you, and you can't just sit around and play victim while you wait for the world to meet your standards.