But these people blaspheme all that they do not understand, and they are destroyed by all that they, like unreasoning animals, understand instinctively. - Jude 1:10
Blasphemy is speaking lightly or profanely of sacred things, especially of God. (Literal Word app)
Ungodly people pervert the grace of our God into sensuality and deny our only Master and Lord, Jesus Christ. They rely on their dreams, defile the flesh, reject authority, and blaspheme the glorious ones.
Archangel Michael did not presume to pronounce a blasphemous judgment on the devil when contending for the body of Moses. He said, "The Lord rebuke you."