Because they turn many people away. You asked for our feedback and several people made a big deal about it. Listen to us, trust us, your project needs all the help it can get. Don't make more reasons to turn people away.
"Whoever acknowledges me before men, I will also acknowledge him before my Father in heaven. But whoever disowns [is ashamed of] me before men, I will disown him before my Father in heaven." [Jesus]