Thr priniciple you seem to have missed is: a church that attends to its members' spiritual life is entitled to a tax exemption.
A church that takes up politics as an activity is not.
There's a difference between telling your flock what Jesus said to the moneylenders, to Pilate, or to the faithful at the Sermon on the Mount, and telling your flock what candidate Jesus would oppose.
I seem to recall some famous religious cat saying "My Kingdom is not of this World." If pastors want to take up the worldly burden, they can jolly well pay the worldly tax like the rest of us sinners.
d.o.l.
Criminal Number 18F
And what is that difference?