From Jim Geraghty’s Morning Jolt out of the National Review Online regarding the legality of IRS employee actions.
Not illegal? How about unconstitutional? I’m no constitutional scholar, but if the federal government is treating groups differently based upon their political beliefs, you have A) an equal protection clause violation and B) a violation of the First Amendment, as you’re impeding the right of one particular group of Americans to peaceably assemble, express their views, and communicate their grievances to the government.
An observation: One of the reasons that this went on, as long as it did (starting in March 2010), and as pervasively as it did, is that apparently no one within the Internal Revenue Service who heard about it thought it was wrong, and that no one thought their superiors — i.e., the secretary of the Treasury and the president — would object.