Charles Spurgeon Commentary Jude 1:22

"And on some have mercy, who are in doubt;" — Jude 1:22 (ASV)

And of some have compassion, making a difference:

They may all, apparently, sin in much the same way; but there may be circumstances that make a difference between them. There may not be the same willfulness, or the same continuance in the sin in some as there is in others; there may be in some cases greater temptation, and therefore more excuse for them: Of some have compassion, making a difference.