Morality is what the holder of said morals says it is. (Famous versus infamous, if you see the connection there.)

Illegal things are illegal because they are illegal. (Semantically null, but you get the point.) I could discuss “malum in se”, meaning wrong or evil in itself, inherently wrong by nature, independent of regulations governing conduct. Or I could discuss malum prohibitum, which is wrong only because it is prohibited. Heinlein wrote, “I am free, no matter what rules surround me. If I find them tolerable, I tolerate them; if I find them too obnoxious, I break them. I am free because I know that I alone am morally responsible for everything I do.” My reply to malum prohibitum.

Morally responsible for what I do? Morals are what I say they are. Killing and eating cattle may be immoral in some places in the world, but not immoral to me. Cutting little girls’ clitorises off may not be immoral in some places in the world, but it is immoral to me. What are morals?

Was Hitler famous or infamous? Most of the western world considers Hitler to be infamous. Most Nazi practitioners consider him famous.

It depends on who's doing the saying.