"spray their towns with pig blood...and the turn every one of their holy sites into a pig farm..."
Good for starters!
"...bury them covered in lard with a porkchop in their mouths..."
Nah.
Just feed their ground-up bodies TO the hogs so they become PART of the unclean animal at the molecular level and their defilement can never, ever be cleansed or washed away.
Simple, safe, effective and, best of all, so-o-o-o easy!
You do not even need to grind them up, just toss theirbodies in the pig pen the pigs will do the rest.