...why are there no right wing folk songs?

Perhaps because they didn't get banned.
The only one that comes immediately to mind is "Here's a health unto His Majesty"

I agree with Mo though, about "family values, patriotism, and high moral standards".

There was no one more patriotic than Woody Guthrie, and folkies are patriotic enough as a group that "This land is your Land" has become the folk National Anthem.

Of course us lefties don't confuse patriotism with blind allegiance to any particular government's military activities.
Also, family values and high moral standards consist of more than just going to church.

Bert.