What they want is irrelevant. As they evolved to avoid being eaten, so we evolved to be able to obtains, eat and digest it. It's not a one-sided process of providing us with a ready made menu.
> At this stage the cult of eating dead animals was borne
Why do you assume we did not eat animals "in the trees"? Is there any evidence to support that? Chimps eat meat on occasion, for example, and when they do the pack literally tears the victim apart.
And describing it as a "cult" is ridiculous. It became important because it is an immense source of nutrients, and available in many places where surviving on available plants/fruits was near impossible prior to the development of extensive trade. The ability to eat and digest meat provided us with yet another evolutionary advantage over many other animals.
> We (as in primates) only pick the ripe fruit, the stuff that is still green is identifiably no good to us
There's plenty of fruit that's green when it is ripe, and plenty that is a different colour than green for a long time before it is ripe.
> we still have hands for nabbling fruit rather than vicious claws to rip apart stray wildebeest
Which have proved superior in providing means for killing animals? Our hands can hold and wield weapons. Which approach to eating meat is better: Tearing apart raw meat, or cooking it? You seem to assume that we are not well adapted to handling our new menu entries and/or that these features somehow means we're better adapted to fruit just because we haven't taken on the characteristics of animals that are terribly limited in their abilities.