When Jesus did miracles, and healings they still denied Jesus and blasphemed him and his works.
Did they really think he was not from God? Or did they know he was God, but did this on purpose? Jesus did convict them of corruption when the priests collected the tithes but did not help the poor outside.
Informational about miracles (signs & wonders)
Matthew 24:24
For false christs and false prophets will arise and perform great signs and wonders, so as to lead astray, if possible, even the elect.
2nd Corinthians 11
14 And no wonder, for even Satan disguises himself as an angel of light.
Back to the original point:
The Pharisees continuously rejected His teachings, time after time, after time.
Unpardonable Blasphemy (sin) is continuous rejection of the Holy Spirit, which leastwise we know some of them did. (Jesus was filled with the Holy Spirit at His Baptism.) Reject Jesus ... one rejects the Holy Spirit as well.
Matthew 22
41 Now while the Pharisees were gathered together, Jesus asked them a question,
42 saying, “What do you think about the Christ? Whose son is he?” They said to him, “The son of David.” (answering in terms of ancestral bloodline)
43 He said to them, “How is it then that David, in the Spirit, calls him Lord, saying,
Psalms 110:1
44 “‘The Lord said to my Lord,
“Sit at my right hand,
until I put your enemies under your feet”’?
45 If then David calls him Lord, how is he his son?”
46 And no one was able to answer him a word,
nor from that day did anyone dare to ask him any more questions.
This is Jesus telling them through scripture (of which they knew very well) and in question format that He (Jesus) is the Messiah.
"45 If then David calls him Lord, how is he his son?”
Question format? By those not answering the final question, nor those not asking further questions are condemned by way of the unpardonable blasphemy sin (total rejection of the Holy Spirit, total rejection of Jesus).