Not bulletproof but it comes with the cultural norms around cooking pork. In combination the cultural norms and the immunity mean pork isn't forbidden like it was by Moses in the Bible. That was the equivalent of a public service announcement for the early Jews, there was nowhere to say "don't eat this it'll kill you" than in one of the books of Moses. That message couldn't be separate from the Bible, everything was conveyed in the Bible.
But like a Spaniard eating nearly raw pork doesn't die. Extrapolate for bad pork, he'll spit it out if it's bad.
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And since when does your one-cent Google search trump my traveling to Spain in person?