The hatred travels from person to person. To make this simpler, when two people hate Justin, one more hates him.
The third person jumps on the bandwagon to "Fit in" with the others.
Quote (EvilChiken)
To answer your question, it's because people need a pariah, and a sixteen-year-old boy singing pop like a girl with songs that sound like they were WRITTEN by a girl, he fit the bill nicely.
This is also true.
I can see that Justin is doing as good as he can, and he is good for doing that apart from all the hatred he is getting. I'm not saying that I like his music, but he is respectable.
Reading into this thread further, I found that we need a music thread.