Hitler was defeated by being nice to him
In that sense you're right- some people only understand and respect force, and the only way to stop them is to use force against them. The analogy of Hitler might be compared to hardened criminals- being nice to a criminal won't stop them from victimizing you.
This is a different battle though. The small % of racists who want to burn minorities' houses down, they must be met with force.
Force doesn't win hearts and minds though. Force is intertwined with fear- 'if you do xxx, force will be used against you'. So it might stop some church burnings, but it doesn't stop racism. Force doesn't win 'hearts and minds'. Force doesn't convince a racist that they were wrong. It might make them too afraid to speak up, but it doesn't win them over, and they will only take their message underground, where it will thrive.
Ever notice it seems like it's always DoorDash with this shit? IDK if they pay people less or are less stringent with their hiring but it seems like it's always DoorDash.