Taking and giving offence.

Confucius says "He who takes offense where none is intended is a fool, he who takes offense where offense is intended is a bigger fool." If someone has no intent to offend me then why take offense? They have made a mistake, probably unknowingly. Did they simply misspeak? are they ignorant of the situation?  I try to see their point of view, Most people don't intend to offend, so cut them some slack. On the other hand, if someone is trying to offend me then they are being a jerk. so why should I give them what they want, and be offended?