Also, organized religious communities provide a great many benefits to their members
And there you have it, tax benefits should only be given to organisations that benefit others, so genuine charities like the red cross that help others and don't act a social club for its members are deserving of tax incentives.
...including help for the poor, food kitchens, etc. Go into the inner city and see who is sponsoring many of the charity efforts that help people there - it's not NASA.
There are plenty of non-religious charitable groups helping the community without the obligatory preaching that goes with it. Churches are out to gain members and what better way to do that than to target vulnerable people with their marketing message in a time of need. It is no different to how any business works in identifying a target group and promoting themselves. This blatant self promotion should not be given tax privileges. This is not to say that the individual people who volunteer to help with these things have anything but a desire to help people in need, the church on the other hand knows full well what they are doing.