Why is it that when someone tries to ridicule the theory of evolution, they always get it wrong?

A combination of non-education, repeating what they are told, and simple refusal to question their own beliefs. Such as what Brad posted above. Links to sites with "disprove" evolution, when in reality they don't. There certainly are things that are unknown, and science is always changing for it. But none of that disproves evolution, no more than theological holes which appear in Christianity (where did Cain's wife come from?).