John Wesley on Jude 1:15

To execute judgment - Enoch herein looked beyond the flood. Upon all - Sinners, in general. And to convict all the ungodly, in particular, of all the grievous things which ungodly sinners (a sinner is bad; but the ungodly who sin without fear are worse) have spoken against him, Jude 1:8,10, though they might not think, all those speeches were against him.