TBF the British Monarchy would eat tomatoes on their pewter plates, because of the acidity the tomatoes would begin to dissolve the plates, Injecting various poisonous elements into them.
Also, tomatoes ARE poisonous as they are a nightshade and contain solanine. Same with potatoes. The modern concentration of solanine is negligible, though, so unless you have a sensitivity or allergy to nightshades you should be fine consuming large quantities.
That's just nonsense. Everything originally came from somewhere else, including humans themselves. Italians invented new uses for those two things and thus established a near-peerless culinary heritage.