Many years ago I was coming back home with my then DP, from a friend's house. A group of 6, big 6' burly blokes (one of which I knew well), all pulled my ex off his bike and really laid into him.
I saw red, and dumped my bike on the opposite side of the road, where I had got to before turning to see where he was.
I simply saw a vulnerable guy (ex has spina bifida and is steadier on his bike than his feet) being set on and that was when my blood started boiling.
I stormed over, not fearing for my own safety, and laid into every single one of those blokes. I was so furious (although I didn't let much of my temper go as I would have been doing time for murder), that I left every single one of them needing hospital treatment, varying from surgery to one needing over 20 stitches. We're talking knock-outs (I used the bent legs of 2 to lever myself up to knee both in the head, knocking them both out), broken jaws, wrists, eye sockets and noses, dislocations, large deep cuts, cracked bones and extremely deep bruising. One managed to leg it down the road, and had I caught him, I would have finished off the rest of his hiding. I just wasn't giving up disabling the blokes until my DP was safe to get away.
I got away with a black eye, deep bruising on my arms and legs and a few cuts. The black eye was a right steaker, but a few days later, I got the nickname "The Murderous Midget"
None of them were willing to go to the police because they thought that the cops wouldn't believe them. 6 burly men who could easily overpower me, but failed. The police probably would find that very hard to believe.
Anyway, my moral is, that no matter who tries to attack me, or any member of my family, I will retaliate forcefully. If that lands me in prison for protecting my own, then I'm happy to do time.