Let's say hypothetically that someone feels strongly that they should have the right to kill lefty politicians trying to destroy their country. Do they have freedom of conscience? Who are we to say that they are wrong? Why do we legislate our morality on them?
For the record, this is done to show the ridiculousness of lefty politicians' positions, not as an implied threat.
Fine John K., so Catholics shouldn't listen to your "life begins at conception" line, 'cause it makes no difference in your (occasional) Senate votes - obviously we know this from the record.
(Idealistically speaking,) Elected officials are placed in office to vote in a manner that represents the best interests of the people and the country. But note that every vote expresses a belief or opinion - whether for or against a particular religious viewpoint, whether for or against the viewpoint of a particular lobbyist/special interest group, whether for or against the people of the United States.
Singling out religion as something you won't take to the voting booth is a red herring, for it's simply another yardstick against how your record is measured. If you aren't proud of your voting record and can't defend it, then don't blame religion -- or anything else, for that matter -- when you are criticized for it.
And by the same token, don't cite religious beliefs and then say you ignore them in an effort to play to both sides of an issue (again).