"Here's proof that religion is insane and most people are predictably and systematically stupid, including yourself.

This doesn't seem too implausible. I have no trouble believing that religion is false ("insane" is an incendiary term that I do not believe should be invoked in a non-clinical context due to triggering most people's "mind-killed" modes), as well as believing that people are predictably and systematically irrational (same deal with "stupid"). Are you arguing against this?

Now believe in the Singularity, general self-improving artificial intelligence, cryogeny, space expansionism, and libertarianism!"

I have not seen Eliezer ever advocate for his personal views on these topics outside of posts dedicated specifically to said topics. Most posts in the Sequences just talk about basic techniques for rationality, without ever mentioning any of the stuff you've listed. Indeed, the two major prongs of his worldview--rationality and transhumanism--seem to be largely (almost entirely) detached from each other. I'm having a hard time seeing this "preacher approach" you're talking about in Eliezer's writings.