While Odin was blind to him, Thor was not. And while Thor was not... smart, in those dreams, he did not ignore his brother. Had he been able to see past his jealousy of Thor, things would have gone far different.
He chose a course of action designed not just to cause humiliation and pain to those who had done him no wrong, but to cause true damage as well. He acted out of pain, perhaps, but he acted with the shortsidedness of a child.
I look at both of our alternates and cannot help but wish these dreams had never come.