Question

Hello Rabbi, I saw a question here that was asked yesterday, and it raised a different question for me, somewhat similar. If God's validity rests on morality, why did God not command us in His book only clear moral teachings?
Doesn't this itself raise a difficulty, even if from a logical standpoint perhaps there is a major objection here. If God is morality itself, how is it that the only book that claims to represent Him does not reflect that?
And also a few questions about what the Rabbi did answer:
The comparison the Rabbi made to a lame person—if in the lame person's book there were conclusive proof that such a reality of a lame person could not exist, we'd have a problem. The same thing applies when God commands things that are not moral; He is almost contradicting Himself, isn't that so?
And as for the fact that within morality we find branches that contradict one another—that is because they are healthy yet limited products, and therefore contradictions may arise; one cannot expect otherwise. But for God, where did the contradictions come from? Why does He come to contradiction, almost to the point of contradicting Himself?