I have never understood why religions consider their tax-free status being taken away an attack on their religious freedom. Religious freedom and tax freedom are two completely different things. If anything, wouldn't removing tax-free status from religion hinder these large corporations from engaging in questionable activity and being allowed a veil to protect individual members?
Consider this recent example:
http://www.wtsp.com/news/article/282987/34/Federal-suit-Scientologist-spent-30-mil-to-cover-death