Let's say that, 2 million years prior to the present day, a meteor impacts roughly in the middle of the Strait of Gibraltar. It is large enough and strikes at sufficient velocity to create an impact crater 100 kilometers in diameter and 10 kilometers deep at its deepest point, which completely destroys the land on either side of the Strait and generally turns it into a gigantic crater that's a lot less of a strategic chokepoint.
Would such an impact wipe out all of the ancestor species of humanity that existed 2 million years ago via mechanisms such as a global winter, direct blast effects, or debris rainout? Failing all of them dying, would it at least kill enough of them that inbreeding would kill the species as a whole?
I recognize that the Chicxulub event is a leading contender for "the thing what wiped out the dinosaurs", and that the crater produced as a result of that is 150 kilometers across, suggesting that these two events would be at least vaguely comparable in magnitude, but I don't know if my impact event would wipe out proto-humans as effectively as whatever killed the dinosaurs killed them, as the former were, from what I can tell, somewhat more intelligent, and this is a smaller impactor.