I don't see epistemological relativism in anything that Chomsky says in these quotes, nor is there is any rejection of the idea of truth...nor do I see any resignation to just analysis, abstaining from change. And, in truth, Jesus' conversation with Pilate is hardly a philosophical interrogation of first principles or epistemological veracity...actually, I think the Jesus and Pilate conversations in the Gospels capture precisely what Chomsky is getting at:
Matthew 27: 11-14 Meanwhile Jesus stood before the governor, and the governor asked him, "Are you the king of the Jews?"
"Yes, it is as you say," Jesus replied.
When he was accused by the chief priests and the elders, he gave no answer. Then Pilate asked him, "Don't you hear the testimony they are bringing against you?" But Jesus made no reply, not even to a single charge-to the great amazement of the governor.
Mark 15: 1-5: Very early in the morning, the chief priests, with the elders, the teachers of the law and the whole Sanhedrin, reached a decision. They bound Jesus, led him away and handed him over to Pilate.
"Are you the king of the Jews?" asked Pilate.
"Yes, it is as you say," Jesus replied.
The chief priests accused him of many things. So again Pilate asked him, "Aren't you going to answer? See how many things they are accusing you of." But Jesus still made no reply, and Pilate was amazed.
Luke 23: 1-4 Then the whole assembly rose and led him off to Pilate. 2And they began to accuse him, saying, "We have found this man subverting our nation. He opposes payment of taxes to Caesar and claims to be Christ, a king."
So Pilate asked Jesus, "Are you the king of the Jews?"
"Yes, it is as you say," Jesus replied.
Then Pilate announced to the chief priests and the crowd, "I find no basis for a charge against this man."
John 18: 33-37 Pilate then went back inside the palace, summoned Jesus and asked him, "Are you the king of the Jews?"
"Is that your own idea," Jesus asked, "or did others talk to you about me?"
"Am I a Jew?" Pilate replied. "It was your people and your chief priests who handed you over to me. What is it you have done?"
Jesus said, "My kingdom is not of this world. If it were, my servants would fight to prevent my arrest by the Jews. But now my kingdom is from another place."
"You are a king, then!" said Pilate.
Jesus answered, "You are right in saying I am a king. In fact, for this reason I was born, and for this I came into the world, to testify to the truth. Everyone on the side of truth listens to me."
The synoptics agree: Pilate asks if Jesus is King of the Jews and Jesus answers "Yes, it is as you say."
You would think "speaking truth to power" would involve a bit more...something like, "I am King and you are a fraud...this entire imperial enterprise and its facade of power and domination...all of it a sham...just as these so called "Jews" are a joke and blemish on God's torah and promise of justice...neither you nor their council can deliver peace...you are mistaken to think you know the truth about power or the power of truth...your trials and whips and crosses establish injustice, deny peace and enforce lies wherever they go..."
Pilate even offers Jesus a chance to confront the lies made against him...and, instead of speaking truth to power, Jesus stays silent- to the amazement of Pilate.
John's Gospel comes closest to "speaking truth to power", but, as in the synoptics, Jesus does not confront Pilate with the injustice, lies and perversion of power that makes his empire possible...the Jews are held accountable, but not the Romans.
Speaking truth to power, in the very least, is an effort to hold power accountable: exposing its lies and abuses and how these deceptions are necessary in maintaining dominance.
Jesus, as the Gospels show, does not engage in this behavior...rather, like Chomsky, he speaks truth to an audience for which it makes a difference: the masses of peasants, fishermen, and other relatively powerless Jews living under Roman imperial occupation.