@DontTreadOnMe,
Sorry but without the tax deduction, many people would not be able to give as much as they do and many would not give at all.
Without the tax exemption, many charitable organizations would need to divert considerable contributions toward paying taxes on their property and would be obligated to pay taxes on any contributions or fees for services rendered or those fees would have to be increased creating additional hardship on the low income people served. Church and Religious based schools, universities, colleges, and those religious organizations that sponsor or operate thrift shops, soup kitchens, homeless shelters, pre-schools and child care services, after school programs, enrichment activities, free or low cost counseling, domestic violence shelters, special projects to supply poor children with backpacks, lunchboxes, school supplies, mittens, coats, socks, and any number of other valuable, worthwhile, and necessary programs and services would be severely hamstrung in their ability to provide services. The sheer paper work and reporting requirements would eat considerably into the profits.
I am speaking as one who has been executive of or otherwise worked for such organizations as a vocation and/or avocation most of my life. Those who are hostile to religion or who have not worked in such programs have no concept of all they do and what a huge void would be left if even 1/4th of these programs were cut back.
I honestly believe that any tax revenues paid to the government would not even come close to the cost of the government having to pick up the slack created by the void that would almost certainly be created. There is no way that not putting religious organizations under govenrment control violates the First Amendment in any way.
To deny religious organizations a tax exemption, however, while allowing it for charities that claim no religious affliation would violate the First Amendment. IAnother thing to consider is that there are precious few charities that are not affiliated with some religion. You find very few Atheists who go into that line of work.