Words of warning – repeatedly!  Woe to you – repeatedly!
(NASB) Luke 11:47-51 “Woe to you!  For you build the tombs of the prophets, and it was your fathers who killed them.
48 ‘So you are witnesses and approve the deeds of your fathers; because it was they who killed them, and you build their tombs.
49 ‘For this reason also the wisdom of God said, ‘I will send to them prophets and apostles, and some of them they will kill and some they will persecute.”

Immanuel – God with us – Matthew 1:22.
In Luke 11:49, “the wisdom of God” sent prophets and apostles (in the Old Testament as well as the New Testament), to tell of God’s righteous ways through His Son – and His Son was killed – His blood shed and their actions would be “charged to this generation.”

“Charged to this generation” they would be held accountable, they would be culpable (responsible for wrong or error; deserving censure, they would be blameworthy).
These people were warned by Jesus throughout His ministry.  These people were warned by their Scriptures in the Old Testament!  Did they listen? No, they would be charged because they rejected God’s own Son, the Lord Jesus Christ.

(NASB) Luke 11:50-51 “so that the blood of all the prophets, shed since the foundation of the world, may be charged against this generation,
51 from the blood of Abel to the blood of Zechariah, who was killed between the altar and the house of God; yes, I tell you, it shall be charged against this generation.’”

Why was that generation charged with the blood of the martyrs, from Abel (who was killed by Cain Genesis 4:1-8) to Zechariah (possibly referring to 2 Chronicles 24:15-22 or a later Zechariah martyred).  Because Jesus Himself was there!

Over and over, Jesus warned these religious leaders, Pharisees, scribes and lawyers who would be held accountable…for He was among them and they rejected Him.  “Charged to this generation” were not idle words but words worthy of paying attention to; God’s love does that!

He warns against acts of rejection, unbelief, violence.  How do many people respond?  They do not listen.

We are held accountable to tell others of God’s ways…not what we want to think about God; but, Who God really is (He has revealed Himself through Jesus) and we need to listen!