Negative connotations

Propaganda and ideology. Both words used to have positive connotations up until the famous leaders used them.

Being propagandist during the time of Congretaion de Propaganda Fide used to be a noble job. Then Hitler and Goebbles came.

Ideology used to be a positive term as well. Then Napoleon came.

Are there any words, that used to have negative connotation and then someone with lust for killing came and it became positive? Guess not.