Taking the title on face-value:

Yes, absolutely. Does that give a man the right to go around beating up women because they looked at them the wrong way? Absolutely not. xD Just be mindful that, typically, women aren't as strong as men, so remember you may not need to be as heavy handed. (not just in a hitting sense—although I can't imagine it being necessary to hit a woman, unless perhaps a life or death situation—even just in a pushing-them-out-of-the-way sense)

I've personally not been in a situation in which I've had to use force vs a woman, except perhaps against an ex who was a tad too determined, if you know what I mean, and even then, I didn't feel right. There are those women that take advantage of the guy who doesn't want to go around bashing them around, by provoking them every chance they get. (I really abhor those kind of cowadly women, and I imagine there to be similar sort of men)

Having read the rest:

Uuuuum... what? If someone bumps into you in the street, you do NOT pull a knife on them, dude; that would, at least in my opinion, be unnecessary and nigh on inappropriate. Wind back a tad. Also, the guy above me has sound advice worth taking in.