Yes, I'm familiar with the story. But only the Jewish converts were seized. If Stein had renounced her faith would she have been spared? Almost certainly not. The proximate cause was criticism of the Nazis, not Catholicism (however hostile the Nazis were toward Catholicism). It's obviously a sensitive issue because many Jews suspected the church was trying to deflect from its own entanglements with the Nazis by promoting a Jewish-Catholic saint. It can be seen as exploitative.

<<What distinguishes Edith Stein from any one of them was she was canonized, most of them were not.>>

So you're saying canonization is arbitrary and not necessarily meaningful? An argument could be made.