Maybe, but there a possibility they know it's not a valid argument but believe they can still use it effectively. Just because someone supports a position doesn

Maybe, but there a possibility they know it's not a valid argument but believe they can still use it effectively. Just because someone supports a position doesn't mean they know it's valid, not that they know it's moral. Plenty of people, and especially politicians of some persuasions, are happy to spout known lies and deceptions to get to their preferred outcome.