^ Saying that a black cat being unlucky is racist is just stupid. You aren't saying black people are bad luck, you're saying black cats are bad luck. Cats don't have a race, they're just cats. It's like one person saying "I don't like black coffee." and then another person saying "That's racist you don't like black coffee hurr durr." It makes that person sound like an idiot because black coffee ≠ a black person. If someone says a sentece with the word "black" or "white" or "yellow" in it does NOT always make it relative to a race.
For clarification, I did not just call you an idiot. It's just how I feel about that kind of comment. If I went too far just tell me :)