No, I think that we should just stand for religious freedom.
Pastors should be able to say pretty much anything from the pulpit without gov interference.
The foundation for the tax exemption is not that the churches are apolitical, but rather that the gov doesn't tax God.
Of course Democrats would prefer to tax God, the ultimate rich individual, He owns it all.
If it comes to the point that pastors cannot teach and preach from the Bible in their church's without private and government monitors and interference then we've lost. It hasn't really happened yet but various groups around the country are attempting to impose upon preaching within the church standards which are opposed to the whole counsel of God's Word. At that point the church has been coopted by the state and is no longer able to fulfill it's biblical mandate. That is the ultimate goal of those on the left.
As you stated to those on the left taxes are the ultimate form of control and would symbolize subservience of the church to state.