What you cannot do is deny Christian groups access to facilities that you grant to secular or political groups.I'm not denying Christian groups access to anything.
It's just that as a Christian, (Roman Catholic specificly), I firmly believe that church facilities are the best venue for religious meetings. Why settle for inferior facilities at the public schools?
You can believe what you want to believe. But why don't you let the people who are
holding the meetings decide
for themselves where the best facilities are? How do you know that the facilities are inferior in this case? I remember going to a religious event in our public high school auditorium. To my knowledge there would have been no local church, including my own, that could have supported that size of audience.
Earlier you claimed it was a shame that the local churches were unwilling to hold the meeting. You seem to know more about this situation than the people who were actually in it.