Conservatives need to pound home the idea that liberals are ethically and morally crippled.
Typically, when they do so, they phrase it in religious terms, and while this is technically accurate, it allows liberals to both curse religion and pretend religious, or lack of religious persecution.
So instead, conservatives need to point out that liberals are, from a *secular* point of view, ethically and morally crippled.
To effect that, “Just because you do not believe in God is no excuse for you to behave like brutish animals.”
This matters, because liberals have long cherished the idea that the lives of animals are *better* than the lives of humans.
“Animals are as one with nature.”
“Animals are amoral, they do not believe in good or evil.”
“Animals are sexually “free”, without repercussions to their sexual behavior. They can choose any kind of sexuality they like, as all such sexuality is “normal”.
“Humans are overpopulated and must be returned to the ‘state of nature’, by killing off 90% of them, and stripping the rest of technology, history and learning, so they remain like animals. Except, of course, for the elites who keep them that way.”
etc., ad nauseum.
Liberals need to be taught that these philosophies, and more, are indeed evil, and cruel, and stupid, no matter how much they want them.
Out of curiosity, what do you say when the liberal in question doesn't behave a like a brutish animal?