Four Reasons Kamsa Could Justify His Actions Against Devaki And Vasudeva

“The procession was passing very pleasingly, and Kamsa was driving the chariot, when suddenly there was a miraculous sound vibrated from the sky which especially announced to Kamsa: ‘Kamsa: you are such a fool. You are driving the chariot of your sister and your brother-in-law, but you do not know that the eighth child of this sister will kill you.’” (Krishna, The Supreme Personality of Godhead, Vol 1, Ch 1)