These are very strong claims. Any references? (For example freezing can destroy cells and tissue, but how can it destroy molecules? Microwaves are non-ionizing

These are very strong claims. Any references? (For example freezing can destroy cells and tissue, but how can it destroy molecules? Microwaves are non-ionizing so how can they give you cancer? Plus someone already mentioned that it's the metal mesh behind the glass - a Faraday cage - that keeps the microwaves inside.)