I don’t believe Snegiryov was insincere when he tells Alyosha how much that 200 rubles would mean to his family. I believe he meant every word he said, but was he just doing that make his point of pride to Alyosha? Is he, too, like Katerina and Ivan, martyring themselves for pride? The boy, Ilusha, his pride is not sinful, he has no other way to defend his family so biting Alyosha makes sense, but adults know better.