Why was Queen Elizabeth described by Hitler as the most dangerous woman in Europe?

When referring to this we must remember that this is a reference to the late Queen Mother, the mother of the current Queen of England. The late Queen Mother was the Queen consort during Hitler's time and also named Elizabeth.

He referred to her as the most dangerous woman in Europe because she refused to leave during the London bombings and continued to visit the bombed out End End during WWII, inspiring the people to resist the blitz.