It works like this, Buck.
I love God, my Country, family values, free markets and small government.
Therefore, anyone who is not in total agreement with every single one of my policies must hate everything I and all good people everywhere believe in and be a statist, Socialist scumbag to boot.
Therefore, anything they believe in, whatever the subject, whatever the reason, must therefore be evil.
Consequently, any lie, prevarication, obfuscation or dirty trick I can pull on them is perfectly justified, in fact it is a moral requirement.
QED.
It's hard to pull a fast one on the truly logical, righteous and virtuous mind, isn't it? God said it, I believe it, and that's all there is to it.