Isn't Pantheism no more than just an ordering and categorising of philosophical ideas....for existence a God of War,,,,,,why not a cross departmental God of conflict for instance?
I think that asks the question who decides demarcation of jobs and the reason for it.
Monotheists suspect pantheists of mere philosophical categorising, atheists can smell it....and often like it which is why they give pantheists an easier ride.
But look at it this way....Thinking must inevitably turn away from Gods to the one or the one God and we see this in monotheism, platonic philosophy and in scientific theories of everything.