(Another angle) how this is not mortal worship, spiritualism, witchcraft, or magic

Because it is not worship.

Showing their bodyparts around is the literal proof of the existence of those human saints. Who in their lives endured great pain for God, helped those in need, and most even became martyrs of the faith. Role models, who are closer to God, than those who still live and commit sins, though trying not to.

In their lives and after death - when mentioned in prayers, which also not equals to worship - miracles happened. Which miracles happened through them, but _not_by_them_.

Worshipping is for God only, but saints can be honored, and as being closer to God, can be asked in prayers for intercession.

Those who are ignorant, and/or those who are against Christianity keep on trying to emerge it into witchcraft. The same people spreading the lies, are usually silent about certain other religions' evident evil deeds and real withcraft.

This is what christians do. They speak to the dead, soothesay, and disgrace G-d.

A guilded crock of shit.