I’m not sure where you’re from, or what the composition of your social circle is, Lumifer—but I think you should find as many people as you can (or use whatever reasonable metric you have for determining a “normal person”) and say: “Being stupid is a disease. The first step to destigmatizing this disease is to stop making fun of stupid people; I too am guilty of this,” and then observe the reaction you get.
Personally, I’m baffled as to how you could think that this wouldn’t engender a negative response from someone who’s never been on LW before.
That being said, simply changing the theme from “anti-stupidity” to “pro-intelligence” would change the post dramatically.
I don’t believe you, and I’m especially skeptical of IQ—and a lot of other fetishizations of overly confident attempts to exactly quantify hugely abstract and fluffy concepts like intelligence.