There is no evidence in the bible what kind of wine Jesus used. Wine in biblical times could refer to fermented or unfermented drink.

During Jesus lifetime, there is archeological evidence that apices and fruits - including pomegranates, mandrakes, saffron and cinnamon - were used to flavour wines, and tree resin were added to help preserve them.

So, the wine drank at the Last Supper might actually resemble the mulled wine some of us drink at Christmas.

Basically, this has nothing to do with being faithful to Jesus, but more with archaic rules that were agreed upon centuries after Jesus' lifetime.They are canonical to Catholic teachings thoughm