The fact that ionizing radiation causes cancer because it resonates with DNA bonds does not mean that other kinds of radiation could not cause other types of cancer.

Other kind of radiation will resonate with bigger molecules and could do things like denaturalize them.

Have you ever fried an egg. You are denaturalizing a protein that is liquid and becomes solid, and you have done that just with heat alone.

You can actually denaturalize an egg in the microwave oven, and there are certainly lots of health problems when the microwave oven leaks microwaves.

When you denaturalize something in the body, it stops working as it should. This creates a cascade of things that stops working as they should.

I don’t think they were only using microwaves.