Let it go?! Why?

Why can't I let it the whole issue with my bully go. I've been told I should. That he's not worth the trouble. But here's my question: Why should I let it go? Would he let it go if someone called his wife a bitch, slut, cheerleader, little soul whore, or pyscho princess? Would he tell he she needed psychiatric help because she didn't like it and told the person who called her such things? No. From his writings he'd, most likely, react strongly and angrily. So why is my anger any less justified? I was wronged. I demand an apology, not only for me, but for everyone he has specifically insulted, threatened, and libeled.

He says “To sum it up in case its not clear. I own my actions. I own my words. If you have issues with them, take them up with ME. Not my wife. Not my friends. Not my family. If you don't have the spine to do it, then maybe its not worth being said. If you are afraid of the reaction to the words you want to say, maybe they are not that important to you. If you are not willing to face the consequences to your actions then maybe you shouldn't engage in those actions. “ Well I tried. I confronted him directly over email and he blocked me. How is that owning his words? I didn't go to anyone but him, and he refused to acknowledge his behavior. He boasts about the consequences others should face if they make him angry, but runs from the consequences of his own words. He will not face the anger of one woman who doesn't like being called a bitch or crazy. I would like to take up my issues with him, he won't face me.

Why can't I let it go, people ask. I say, why should I? He's a misogynistic asshole who chooses what he thinks are weak targets. Anyone who knows him should be angry at what he says. If he has a right to spread his hatred and cruelty, then I have a right to angry about and say so. Give me one reason I should 'let it go' and just ignore him? Ignoring my bully is like walking away when you see someone getting beat in an alley. Anyone who ignores him, does nothing, or supports him, should be ashamed of themselves.