Dear Peter,
[1] Metaphysics is surely not science (see Popper's demarcation criteria). It belongs to philosophy, where philosophy touches science. So, it belongs to philosophy of science.
[2] What 'things ARE' is precisely problematic! (see the current problem of 'reality' being discussed by philosophers of science at this ResearchGate).
[3] Is Christian metaphysics magic? Please give me your scientific arguments. Thank you!
[4] My question is originally directed to computational metaphysicists.
Thank you again for the minutes or ours of your research! Marc