No, times have changed they should contribute to society or prove their NPO status
Churches should be taxed on money used as income and donations over a certain threshold. The laws currently in place are antiquated, and in a technological age where financial transactions can be more open and clear, questionable funding of a state by a religious group should be less of an issue.
From data released by the US Federal Election Commission we can see that political contributions made by religious group have grown massively over the last 30 years. This amounted to multiple million dollar contributions over the last ten years. It can be of no coincidence then that this pattern mimics both the bolstering of the “religious right” in American politics. But it could also be argued that it may we responsible for the recent centre right shift of the Democrat Party, as religious contributions remain high for both major US parties.