Well, at some point when we didn't have tools, we likely consumed less meat, but it's even vaguely wrong to refer to whatever species that was as "we" at that point. It's more that some ancestor of ours didn't eat meat. But that's true of nearly any animal.
A great deal of our evolution took place while we ate meat. Ancestors of ours that didn't eat meat would hardly be recognizable. This is evidenced in part by the fact that we are omnivores. Also through the fact that even Neanderthals used hunting tools. Also, I believe, through the structure of our teeth, and just in general, the structure of our body and digestive system. And most primates, tools or no tools, are omnivores.