"Well, sure, if you bother to click to the Members page (and note whose name is up top in the banner!)."
Tancredo is the chairman. Just because you dislike Tancredo doesn't mean you have to act totally irrational. What you wrote would be no different from me writing: "why is president Bush's name displayed so much on the GOP's website? He's not the only republican! There are 287 republicans in the house of representatives and senate!"