Unpardonable sin: Blasphemy of the Holy Spirit

attributing the miracles of Jesus to the power of satan and only one group dies this. guess who?
Mark Chapter 3: 22 And the (Jewish) scribes which came down from Jerusalem said, He hath Beelzebub, and by the prince of the devils casteth he out devils. (the Jews accused Jesus of casting out devils and performing miracles by the power of the devil)

23 And he called them unto him, and said unto them in parables, How can Satan cast out Satan?.........

....28 Verily I (Jesus) say unto you, All sins shall be forgiven unto the sons of men, and blasphemies wherewith soever they shall blaspheme:

29 But he that shall blaspheme against the Holy Ghost hath never forgiveness, but is in danger of eternal damnation:

30 Because they said, He hath an unclean spirit. (The Jews accused Jesus of being possessed of a devil / demon)