Well, Einstein prefaced that exact portion by saying, "To see what I mean, forget all about quantum mechanics for a moment." You misunderstood what he wrote.

Well, Einstein prefaced that exact portion by saying, "To see what I mean, forget all about quantum mechanics for a moment." You misunderstood what he wrote. He did not describe entanglement when discussing the red and blue pair of socks. He was creating an analogy to build his argument that he later transferred to "spooky action at a distance".