Sorry, no definitions found.
Sorry, no etymologies found.
I would also advise him to see them as such - for in truth, the views generally described as Progressive and the views of the religiously-motivated Right Wing are antethetical.
Actually, the views of the religiously motivated domininous right wing are antethetical to the Constitution, to the Enlightenment and to the very concept of individual liberty.
A dash of American Exceptionalism, perhaps, which is antethetical to socialism. ric