“I’ll ask again... this is constitutional, how ?”
It is as Constitutional as the orders given by Lincoln to have Federal troops completely devastate and destroy the civilian South.
Lincoln is praised for it.
Lincoln gave no such orders. That is a Lost Cause myth. Sherman’s march was a tactical decision made by Sherman with the approval of Grant. It was the right decision. The democrat generated Confederacy was nothing more than the use of poor uneducated southerners who owned no slaves to fight for the keeping of the ruling class slaves. Ignorance then fostered a national disaster in the same way it is being done today. Wars are not won by being nice to the enemy or their civilian supporters.