John Gill Commentary Genesis 31:28

"and didst not suffer me to kiss my sons and my daughters? now hast thou done foolishly." — Genesis 31:28 (ASV)

And have not suffered me to kiss my sons and my daughters ?
&c.] Did not give him an opportunity of taking his farewell, which used to be done with a kiss, as it is with us at this day: by his sons he means his grandsons, and so the Targum of Jonathan, my daughters' sons; and by his daughters Rachel and Leah, and Dinah his granddaughter.

you have done foolishly in [so] doing :
since, as he would have him believe that he was both a loser by this step he took, and exposed himself to danger, seeing it was in the power of Laban to do him hurt, as in (Genesis 31:29); but Jacob knew what he did, and that it was the wisest part to follow the direction of God.