If Satan were to run a political campaign, his strategy would be to get a large group of people to vote based upon one, single issue, elevating the morals of that single issue above all others, and he’d then proceed to do vast amounts of damage in the name of righteousness, supported all the while by his voting base.
He would be very systematic about this, coming at this single issue from all sides. It would be well branded. He’d tie it into money and spirituality, and he’d use very strong language to convey the seriousness of both the morality and the ethics of this issue.
When discussions about anything else came up, regardless of their validity, he would revert back to this single issue, saying, “but that is not as important as this…”
He would have people bond and organize around this single issue, constantly talk about this single issue, and then have them assure one another that as long as they’re ok (or on the side of) this one issue, they’re okay overall. He’d convince them they’re “right”. He’d have them feel assured and self righteous about this. And as long as progress - however small - is made on this single issue, even if it is just language and promises, that ‘progress’ trumps any other progress on any other issue. “We have this,” he’d say, “which is better than that.”
Once he had people believing the single issue campaign, he would simply have the people that do his deeds and bidding use the appropriate language so that they would always have support from the base. In this way, when their opponents or critics said anything, they’d always have a response.
The above is essentially a summary of The Screwtape Letters, a book by the great C.S. Lewis. The book is comprised of letters from a master demon showing an up-and-coming demon how to lead good people astray.