There is a difference between an open mind and a wise one. Anything
goes doesn't wash.
Most of us have arrived at atheism through science, reason, and the
processes of elimination.
When Christians use the same arguments we may have thought through a billion times we are not being intolerant to reject it out of hand, we are wisely standing against what we consider superstition and ancient anachronisms. We may have been there too, at one time.
Evolutionary Biology and Cosmology have lots of information that Christians ignore. Why not teach these if we can.