I don't think it is important or desirable to try to "convert" any believers.
I do think that it is very important to fight the kind of non-thinking, evidenceless acceptance of anything that is all that supports some kinds of religious beliefs. This, in my opinion, has to leak over into other kinds of thinking and decision making that is dangerous.
We have many large, complex, long-term decisions to make in our democracies. If this is the nature of the decision making process that is used then there are great dangers involved.
Given that someone converts to a better way of using logic and evidence there may be an affect on someone's religious beliefs. That is a direct consequence of those who say that you have to believe in a 6,000 year old earth etc or you can't believe in God etc. If that causes a "conversion" well, that is the fault of the dogmatic fools putting forward such stupid theological ideas.