Again, what crime has the TEA Party espoused? The TEA Party is for lower taxes, not tax fraud. What crime has pro-life groups or traditional marriage groups committed? The only "crime" these groups have committed is having an opinion and wanting to use their First Amendment rights. Remember, the First Amendment not only protects speech you disagree with, but it also protects speech that the government disagrees with specifically. Read the text itself:
Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances
Isn't that part in bold exactly what the TEA Party groups were trying to do? Opposing groups are allowed to take money and not pay taxes on them. Why can't the TEA Party. If anything, groups that call for higher taxes and then apply for tax exempt status for themselves are the ones who should be viewed with suspicion. There is nothing suspicious about the TEA Party trying to be tax exempt. That is exactly what you would expect them to do. But Organizing for America wants people taxed more. Why would they think that they should be exempt?
Also, this is not just about taxes and money. It is about protecting your donors from those who disagree with your group. For example, if a list of donors to an anti-gay-marriage group were leaked, the donors, their families, and their businesses could be targeted by groups that support gay marriage. It could happen and it did. The law was created to protect donors to civil rights groups in Alabama during the Civil Rights movement and is just as necessary today.
And if you don't think that these groups should be tax exempt, that's great. I agree. But that's not the point. The point is that as of right now, these groups are allowed to be tax exempt under the law. If you like, petition for the law to be changed, but until it is, it must be applied fairly. The IRS can not apply the law to one group and not another, especially when the deciding distinction is a groups political beliefs or support of or opposition to policy. Also, the IRS should not be able to give you extra scrutiny because you oppose the tax exempt status of 501c groups, just as they should not be allowed to scrutinize the TEA Party because they want the 10th Amendment followed.