Her priests have violated my law, and have profaned mine holy things: they have put no difference between the holy and profane, neither have they shewed difference between the unclean and the clean, and have hid their eyes from my sabbaths, and I am profaned among them.
Her priests - whose "lips should have kept knowledge" (Malachi 2:7).
Violated my law - not simply transgressed, but have done violence to the law, by wresting it wrong ends, and putting wrong instructions on it.
They have put no difference between holy and profane ... - made no distinction twin the clan and unclean, the Sabbath and other days, sanctioning violations of that holy day (Leviticus 10:10). "Holy" means what is dedicated to God; "profane," what is in common use: "unclean," what is forbidden to be eaten; "clean" what is lawful to be eaten.
I am profaned among them - they abuse my name to false or unjust purposes.