To address one of your points, number 3.
We've been eating animals for ages, but not on the scale it is now. Some scientists have done large studies that indicate animal products are directly linked to the progression of most cancers. Do you think Evolution justifies the scale at which we consume animals and their by products?
Btw, did you even watch the documentary? At all? I know it was a hard thing to ask, but I was just wonderin.