Obviously, otherwise you would have heard of it.

Jews poisoning wells was a common antisemitic accusation for centuries (and still - Mahmoud Abbas made a very similar, unsubstantiated claim in 2016) Also, accusations of murdering Christian babies to make matzo, generally worshiping the devil and desecrating communion hosts, etc.

what I didn't get was how the poster above was trying to make it sound like a bad thing ("don't they see") - making the enemy of Western values swear off Western infidel technology a perfect well to poison in my opinion.