Doesn't the Dead Sea Scrolls prove Muhammad was lying when he said the Torah was changed and corrupted?

I apologize if I offended anyone with that question. Muhammad is venerated in Islam and there are some places where calling Muhammad a liar will get you thrown in jail or beheaded. I travel to Muslim countries quite often so I know. However, clearly the dead sea scrolls, if they are correctly dated, disproves a lot of what is written in the Quran.