When Jews are accused of killing Jesus just use the Christian Bible to refute them. It teaches that the Christians sin put Jesus on the cross because He died to redeem us to the God of Israel.
Besides that Herod was an Edomite not Jewish.
Let's put one thing to rest. Israel has a right to defend itself - period!
Regarding Jews/Israel, Jesus and the Bible. Herod was not responsible for Jesus’ death. The Great Sanhedrin, which I’ll refer to simply as ‘Sanhedrin ‘, was Israel’s primary ruling governmental body of Jesus day. It maintained limited powers under Roman rule. It consisted of 71 members, which included the Jewish High Priest, Pharisees, Sadducees and other Jewish leaders.
The Sanhedrin, not Herod, condemned Jesus to death for what they considered Jesus’ blasphemy. Re: Matthew 26:57-68
Being under Roman rule, the Sanhedrin had no authority to execute. Initially, Pilate did not want to execute Jesus. The High Priest with Sanhedrin backing demanded Pilate execute Jesus and Pilate eventually obliged them. Re: John 19: 1-16
In John 19:11 Jesus tells Pilate (my paraphrase) that the High Priest’s sin for delivering Him to Pilate is greater than Pilate’s sin for initiating the execution. “Then Jesus said to Pilate: “You would have no authority over me at all unless it had been given you from above. Therefore he who delivered me over to you has the greater sin.” Re: John 19:11
Jesus came to die for the sins of mankind. God used both Jew and Gentile to bring about His death/execution. The sins of mankind (past, present and future) are what nailed Jesus to the cross.