Exactly! But they are not Christian symbols, they are pagan and have been used by Christians without regard to their origin.
While we are discussing pagan symbols, what do y'all think about May poles? Besides the fact that May Day is International Workers Day ( meaning socialist/ communist day) mixed with pagan spring rites, I have never liked seeing kids dancing around the pole. It makes me think of Asherah poles and Canaanite worship. Oh, how must the Tempter be laughing every time Christian kids dance around an Asherah pole!
They are Christian symbols now.