Why do you think Alai is willing to become friends with Ender, even though this will make Bernard angry?

Ali appreciates Ender's respect and friendship Ender gives him more than Bernard's. Alai and Ender become friends when they work together to figure out null gravity and their suits and weapons in the battleroom. Alai is elected the leader of his and Ender's launch group. When Ender moves up to the armies, Alai whispers "Salaam," or "peace," in Ender's ear and kisses him on the cheek. Ender understands that their young friendship is a secret and sacred expression of Alai's religion. Finally, Alai is one of Ender's squadron leaders during the Third Invasion of the bugger war. Ender has progressed so far that he cannot really be friends with Alai anymore, although they respect one another tremendously.