There is a WORLD of difference between a well-placed "smack" on the hand/butt/cheek and VIOLENCE.
If hitting your kid - and I mean really HITTING your kid, is your first action at any sign of misbehavior, then yes, you have an issue. However, after a warning or two a little "pop!" (and IME, it was always more the sound and sense of surprise that got my attention, not any kind of actual pain) is a reasonable escalation to get the attention of a recalcitrant child. I only got struck a few times when growing up, and it was ALWAYS deserved. It was NEVER "violent" either, there is no correlation between the use of violence and a bit of mild corporal punishment.