You can do no violence but also feel sorrow at violence being done. Not only are those stances not incompatible but I'd argue they're in alignment. Violence, done by you, to you or simply involving others, is an occurrence to weep for. Some people are being put through unnecessary pain and some people are of an unsound mind and believe putting others through pain is justified.

I won't judge someone who defends themselves for self preservation but I will applaud someone who continues to try and deescalate violence even as it's being enacted on them... though I will clarify this is all at the adult level, children take some time to come to awareness of who and what other people are and are still growing into their full selves.