What does this note about Judas ("who betrayed him") make clear?

Mark 3:19 (ESV)

19 and Judas Iscariot, who betrayed him.

The final note about Judas Iscariot “who betrayed him,” makes clear that in his work of saving Israel Jesus will not escape rejection by his own, but that he has been willing to include and tolerate even the future traitor within his own circle. After all, Judas also is among those whom Jesus himself has called and appointed (Mark 3:13).1