I understand you point however the principle outweighs individual points. Stateism is an absolute surrender even if the state is benevolent. They reserve the right not to be so, while the church ,though at a form of liberty has surrendered the right to be so. Authority is the issue. Rendering to Caesar that which belongs to God exclusively is a form of theft. Is the Church Free? If so it can not be a tax collector for the state,( publican) which it will become as an employer. When Peter was asked if his master paid tribute this response was in error and Jesus corrected him, nevertheless he was told to pay because he had said he would, ( let your yeh be yeah,.. he that swareth yo his own hurt...and answering a matter before he heard it, all come to into play.) But notice that Peter was told to put a hook with no bait into the water and take money from the fishes mouth to pay, so as to not look like a liar. The money dd not come from Peter Jesus or even Judas who heald the purse. The church is not an exempt organization it is an exception to taxes being f an entirely different jurisdiction.
TO RENDER,therefore to Caesar is to Rob from God.
The Jews of Jesus day essentially had the same fear of conflict and of loosing money and standing and took the 501 c 3 position and declared , We have no King but Caesar..
I would personally perfer to loose the deduction than compromise the Church....