Discrimination is wrong no matter who is doing the discriminating.
I am not against a WIT group, especially given how many are saying it has both male and female attendance. As many have said, there are benefits to both men and women when we involve both groups in problem solving.
I am not against any other group that strives to provide education, mentoring or similar opportunities, especially if they are open to everyone.
Any business oriented group that limits their membership to a certain ethnic, sex, religion or other group is by definition discriminatory. If someone wanted to start a Whites in Technology group they would be attacked from all angles. Why does anyone think it is OK to discriminate against whites, men, Christians, et cetera?
There is never an acceptable time to discriminate.
Each "group" of people, men and women, different races, different age groups, when brought together they are stronger than each individual group can be. Our differences are our strengths when used correctly. Dividing us into separate groups and denying involvement from those outside of that group weakens all of us.
Let's stop attacking each other and start working together to make everyone feel welcome.