Complex sentence: Ax is left wondering whether or not he would have been capable of launching the nuke, and whether or not the rest of the animorphs, and particularly Jake, will ever be able to forgive him.
Split into simpler sentences: Ax is left wondering whether or not he would have been capable of lauching the nuke. He is left wondering whether or not the rest of the animorphs, and particularly Jake, will ever be able to forgive him.