Can atheists convert theists?

[Darwinian]

Why do some atheists (judging from a couple of the responses) feel the need to say that they aren't interested in converting theists, and then show signs of frustration when theists don't agree with them, in the form of resorting to ridicule? That's not very consistent. You should be honest and just say that you'd really like to convert theists, and that it frustrates you when you don't manage it. People don't just ridicule others merely for fun, they do so for a specific reasons, and in this case I believe it is out of frustration. And that of course begs the question, what do you feel you lose when others don't agree with you?

Personally, I have no particular desire to convert theists. If someone wants to believe in X, Y or Z then that is entirely their prerogative.

However, the frustration comes in when people use their ideology as an excuse not to think and rely on it to provide many of the answers to the questions that the Cosmos poses, despite of evidence to the contrary and sometime in spite it.

My main frustration is with creationists who, despite being proved utterly wrong on every count still stick to the child like stories of Genesis for no other reason it seems than they want to believe it even though it makes no sense.

Even this I could tolerate if they simply kept their theories to themselves but when they start lobbying governments and pestering schools to get this nonsense taught in science classes then something really has to be done.