No, speech didn`t do anything. Ideas didn`t do anything. Thoughts didn`t do anything. People did, because they chose to. Blaming it on something they heard is like a rapist blaming his act on having a few drinks before hand or on the length of his victim`s skirt. It`s a sad excuse, nothing more.
So Germans just woke up one fine morning and just decided to exterminate the Jews? Are you trying to contend that Hitler's, יש"ו, rethoric had nothing to do with it? Thoughts and speech certainly did it.