This verse is part of a larger conversation between Jacob and his father-in-law, Laban. Understanding the context is key to understanding the verse. Here's a breakdown:

Context: Jacob had been working for Laban for 20 years, and Laban had repeatedly cheated him of his wages. Jacob, feeling betrayed and wanting to return to his homeland of Canaan, secretly left with his wives (Laban's daughters Rachel and Leah), his children, and his possessions. Laban pursued him, angry about the secret departure and the theft of his household idols (teraphim) by Rachel.

"and didn't allow me to kiss my sons and my daughters?" Laban is complaining that Jacob didn't give him the chance to say goodbye to his grandchildren (Jacob's sons) and his daughters (Rachel and Leah) in a proper, affectionate way. In that culture, a parting kiss was a common sign of blessing, love, and a wish for good fortune. Laban feels robbed of this opportunity.

"Now have you done foolishly." This is Laban's judgment on Jacob's actions. He is saying that Jacob's secret departure was a foolish and reckless act. He believes Jacob's behavior was disrespectful and likely to cause trouble (which it did, as evidenced by the confrontation). Laban is implying that Jacob should have discussed his intentions with him instead of sneaking away. Laban is presenting himself as someone reasonable who would have allowed Jacob to leave peacefully if asked.

In summary, the verse highlights Laban's grievances:

Loss of Farewell: He is upset that he was denied the opportunity to bid farewell to his family properly.
Foolishness: He believes Jacob acted foolishly and unwisely by fleeing secretly instead of communicating openly.

Laban's words are also somewhat manipulative. He presents himself as a loving grandfather and father, even though he had previously exploited Jacob for years. The verse shows the complex dynamics of their relationship, full of tension, mistrust, and competing interests.