male humans ARE more similar to male chimpanzees than to female humans. aren't you married? you should have realized this by now.

Human babies also don't understand concept of ethic, should we treat them differently?

Parrots/delfins/pigs can go into intelect up to 3-7 year old kid and chimps can cummunicate with humans having individual personalities.
Also last years it highly discussed if animals have concept of right and wrong along different studies
http://www.livescience.com/24802-ani...rals-book.html

Also it already proved that animals have their own society/language/social levels/family and they feel pain/emotions same as we do.

What bad is in this scenario? We treat humans with respect doing what we want be done to us and we treat animals with respect doing what we want to be done to us.
Made it society worse when we started treat black people with same respect as white people? you know there was also huge % people who was thinking it would make things worse to do it.

i know you're a scientist, so by definition you must be terrible at analogies, but i'll have to correct you. here's a better one:

a high school student turns in an essay claiming it's nothing like a tale of two cities. then i point out that it is 98% the exact same words as a tale of two cities, in the same order, and therefore, is very very similar to a tale of two cities.

i know that doesn't help your case, but at least it's not completely ******ed.

Yes, because human babies are human.

I'm against conceptually putting humans and animals into the same category. Why do animal rights require that we regard humans as animals?

For me the main reason for animal rights was always that pain is undesirable, animals feel pain, so it's desirable to cause them as little pain and suffering as possible. And to do this you don't need to postulate that humans are animals, humans have rights, therefore animals should have rights aswell.

I agree with you that humans no need to be placed in same category as animals in order to get more attention to issue. And definition of animal and human is not really that important in my eyes.

But I disagree with your idea "When animals become closer to humans then at the same time humans become closer to animals." what you given earlier post.
I agree with @tame_deuces post "I doubt you will find a general causal link between humanizing animals and dehumanizing humans."