National Socialist Party v. Skokie (1977)

National Socialist Party of America was declined a permit to speak in Chicago, the organizers turned to the small, ethnically Jewish town of Skokie—where 1/6th of the Jewish population was made up of families that had survived the Holocaust. County authorities attempted to block the Nazi march, but their efforts were overturned by the U.S. Supreme Court in a terse ruling.

R.A.V. v. City of St. Paul (1992)

After a teenager burned a makeshift cross on the lawn of an African-American couple, the St. Paul Bias Motivated Crime Ordinance—which prohibited symbols that "[arouse] anger, alarm or resentment in others on the basis of race, color, creed, religion or gender"—came into effect. In a unanimous ruling written by Justice Antonin Scalia, the Court held that the ordinance was excessively broad.

At least since 1949 people like you have wanted to control what 'bad people' say.  Unanimous opinions from the Supreme Court say you don't get to.