If your job involves regularly receiving emails like this, you need to run, not walk, away from that relationship. This guy seems like one of those poisonous people who will inevitably screw things up (through some combination of ego and ignorance of the way the world works) and then blame you for it.

Stop. Think about what you're saying for 20 minutes before you reply. No web browsing, just think. This reminds me of an old koan about an unhappy guy...long story short, he was middle class and never fucking got stuff done...