They will not. See what they did in Ancient Rome. They didn't breed out the romans, they engineered a total collapse and killed everyone and everything they don't like.
The end result is Europe being regressed back to the stone age and "rediscovering Arabia and Africa" despite they have knowledge about these places millennia ago (read:the Vatican destroyed the records believing that knowledge is sin.)
They will not. See what they did in Ancient Rome. They didn't breed out the romans, they engineered a total collapse and killed everyone and everything they don't like.
The end result is Europe being regressed back to the stone age and "rediscovering Arabia and Africa" despite they have knowledge about these places millennia ago (read:the Vatican destroyed the records believing that knowledge is sin.)