Marie Antoinette, Queen of France...She was loved but ended up being hung from the guillotine...Why?

She was a beauty, she loved the poor...In those days the poor were called the 'Pheasants' . Marie looked after the pheasants and cared for them. Even at the height of the Winter Revolution when the Pheasants stormed the Reichstag She cared. When they stood at the gate and asked for bread she famously declared 'let them eat steak'. However, this kind gesture was not to save her and the 'lady that launched a thousand ships' was burned at the steak.

Human nature, why did the pheasant's turn against her?