The Principle of Contingent Causation: The Impossibility of Infinite Regress.

[Belacqua]

I understand that what you say is an inevitable conclusion from your metaphysical beliefs.

Those who hold to Neoplatonic, Vedantic, or Buddhist metaphysics disagree with you.

Nope. 
I have no metaphysical beliefs,
and you don't get to tell me what I believe.
The most you get to do, is say that in YOUR belief system, you interpret what I say, in YOUR worldview, in a certain way.

The belief that things must be demonstrated through data to be considered true is a metaphysical belief. It cannot itself be demonstrated though data. 

It is a very common metaphysical belief among atheists these days. 

I'm not saying it's a bad belief.