Interesting idea, but it doesn't make sense to me. If Harry suffered so much that everything is excusable, then why isn't everything excused? And why aren't people told that it was due to not being in his right mind? And why would the muggleborn children not find out about it? Are all the muggleborn kids not having sex?
I'm sorry. Too many whys. It seems as if you wanted to use the universe for grinding your own axeblade, but didn't do the work to make it make sense.