violence vī′ə-ləns noun
1. Behavior or treatment in which physical force is exerted for the purpose of causing damage or injury.
2. Intense force or great power, as in natural phenomena.
3. Extreme or powerful emotion or expression
Which? Because it isn't physical force. And I don't think 3 applies as that tends not to be directed at anyone, and there's no requirement for the 'expression' to be hateful.
Further. That means saying "I hate homophobes" is also violence. So we can't say that either. And then we're on a slippery slope where if you say anything that anyone disagrees with is violence.