This guys sounds like a psychopath! He probably went through some type of abuse when he was younger or he must have been raised in poverty. A child growing up with middle-class parents usually does not get to see violence in the streets of Detroit... That should be your first red flag.
Secondly, his speech is not very coherent, so substance abuse can be in play here. Still, even the Romans had a saying "in vino veritas", meaning when you are drunk, your true nature will show. The fact that he might have been drunk or on drugs when typing this message must not serve as an excuse for the creepy contents. Imagine if you start a real relationship with this guy and he gets drunk or high... Do you think you will feel safe with him after having read this?
Thirdly, he is talking about not taking out certain people... Doesn't that say enough? He apparently seems to have a problem with people that he thinks are "morons". Again, if you were to start a relationship with him, how do you know for sure that he won't classify you under "morons" at some point in his book? He doesn't say what he understands under "morons" other than people that lived sheltered lives in the suburbs...
Seriously, this guy is bad news. If I were you, I wouldn't respond to this or any message he will send you. You haven't met him and you probably haven't developed feelings for him, so just forget about it. If he sends these types of messages to other people as well (which he definitely will), they will realize that he is creepy as well, so don't worry about that.