Adam Clarke on Jude 1:22

And of some have compassion, making a difference - The general meaning of this exhortation is supposed to be, "Ye are not to deal alike with all those who have been seduced by false teachers; ye are to make a difference between those who have been led away by weakness and imprudence, and those who, in the pride and arrogance of their hearts, and their unwillingness to submit to wholesome discipline, have separated themselves from the Church, and become its inveterate enemies."

Instead of Και οὑς μεν ελεειτε διακρινομενοι, and of some have compassion, making a difference, many MSS., versions, and fathers have και οὑς μεν ελεγχετε διακρινομενους, and some rebuke, after having judged them; or, rebuke those that differ; or, some that are wavering convince; or whatever else the reader pleases: for this and the following verse are all confusion, both in the MSS. and versions; and it is extremely difficult to know what was the original text. Our own is as likely as any.