The problem of protecting campus speakers with polarizing opinions has confounded universities around the country in recent years.

The problem of protecting campus speakers with polarizing opinions has confounded universities around the country in recent years.

The killing of the right-wing activist deepened lawmakers’ fears of violence directed against them, and the toxic discourse that has fed such threats.

Colleges are often the setting, and the target, of the nation’s most heated politics. Charlie Kirk’s work on campuses was one factor.