Thank you. However, I think that rashly blocking about proverb "Dog does not eat dogs" shows that maybe I was right, when I used it. I didin't mean "dog" in a direct sense. As it is pointed in the article here, proverbs "are often metaphorical". Perhaps we should not be so tense, if we want to understand others and to avoid additional charges. Maybe I am a naive man, but I am thinking that the tolerance means to be able to accept disagreement.