There is no such thing as "Palestinians" - their existence as a label is essentially propaganda; which unfortunately millions of people have come to believe and even label themselves as. They are simply Arab people from Israeli land - the technical semantics of "annexed" or "occupied territory" are essentially irrelevant since all of Israel is land won by the effort and arms of the Israeli people. The West Bank is such conquered land, and the goods there are Israeli. End of story.
from the article: EU: West Bank goods aren't Israeli