Because anyone can claim moral superiority. It takes virtually no intellectual capacity. That's why even a 3 year old can call you "a big meanie poopyhead." (Which is exactly what your "moral trash" comment means.)
To fully appreciate how meaningless your claim to moral superiority is...not only can a 3 year old do the same thing, but the adult crow is smarter than a 3 year old. So, while you may feel great about your claim, it took less intelligence than exists in a bird's brain.
Now, if you want to try to provide a good argument proving a moral proposition, then you might get my respect. But, I doubt you could even get through the various extant Moral Theories, much less cobble together a coherent argument.