Black Christians are unable to have an honest discussion about religion

So it’s been two years since I came out as an atheist to my family, and every time they try to convert me I bring up that they wouldn’t be Christians if it wasn’t for the fact that it was beaten into our ancestors during slavery. Then they go straight into hush mode. Which usually happens when it’s brought up. What is even the point of asking why I’m atheist if all you’re going to do is put your fingers to your ears and not listen?