It is absolutely wrong to say "从此知道了余杰这个人就是这样 一个丧失了人类基本同情与道义的人. 他的观点不必再深究了". Even a criminal can be right sometimes. If you refuse to listen to a person just because he said something wrong, you probably cannot listen to anyone in this world.
A enemy 's enemy may not be your friend.
Based on science, a normal childhood is good for a person's mental health. So 弃儿 could have a higher probability of being 变态. That is why parents should not abondon their children. Although not all 弃儿 are 变态, 孔庆东 sounds like a 变态 when he spoke a lot dirty words on TV.