Religious people should not try to infect others with their disease
I can be friends with someone who is HIV-positive. Why not? I don't judge people. However, the moment he wants to have unprotected sex with me because he thinks I too should be HIV-positive, the friendship ends right there.
I can be friends with an alcoholic. I will make it clear to him that I don't drink. If he still tries to make me drink alcohol because he thinks being an alcoholic is cool, the friendship ends right there.
I can be friends with religious people. I will make it clear to them that I am not superstitious and that I think religion is the worst thing that ever happened to mankind. If they still want to engage me in idle prattle about their specific brand of myths, or worse, try to converse me to their reprehensible superstition, the friendship ends right there.
People should not try to infect others with their disease. It's not polite.
Religious people should all act like the Amish. They live their lives according to their beliefs and bother nobody else with them. That doesn't make their beliefs less ridiculous, but it makes them nice, polite people.
All religious people should be that unobtrusive, humble and above all silent.