I'm all for the good things religion does. It just so happens that none of those good things cannot be achieved without religion.
Never have I ever come up to a religious person and started demanding they renounce their beliefs or justify them to me. However, should the subject arise, I am always interested in discussing the issue.
Here's the thing: I assume people would prefer to believe something that's true. I also assume people would rather not believe something that's false. If those two things do not apply to you, then you need never discuss beliefs with me because I would have nothing to say to you about them.
However, if those two things do apply to you (of course, they apply to me) and we also happen to disagree on perhaps one of the most important questions, then the situation becomes as such that at least one of us is wrong. Because we would both prefer to believe things that are true, and not believe things that are false, ideally we would both collectively toss aside our biases and endeavor to find the most correct answer, regardless of what it is.
It was through this method with my best friend that we discovered the most likely solution was that the claim that gods exist was not made with any supporting evidence whatsoever. Later in life, through this same method I also discovered it was most likely true that gods do not exist at all.