?) You're saying someone can crawl through my window and I can't beat his ass until he touches me?
thats a different situation, if the nig crawled through your window then thats breaking and entering. Your allowed to detain him, but tie him to a chair and breaking his knees is not allowed.
Self defense is only actually considered so after the subject in question has made an physical attempt to harm you. So capping a nig whose running at you doesn't count as self defense.
@OP your best bet at teaching this disrespectful low life a lesson is getting up in his face, without touching him, and getting him to push/touch you in any way and then just wail on him 'with your bare fist', and not a weapon.