Wilt thou judge the bloody city - Pronounce the sentence of death against the murderers.
Show her all her abominations - And a most revolting and dreadful catalogue of these is in consequence exhibited.
Matthew Henry
Concise Bible Commentary
The prophet is to judge the bloody city; the city of bloods. Jerusalem is so called, because of her crimes. The sins which Jerusalem stands charged with, are exceeding sinful. Murder, idolatry, disobedience to parents, oppression and extortion, profanation of the sabbath and holy things, seventh commandment sins, lewdness and adultery. Unmindfulness of God was at the bottom of all this wickedness. Sinners provoke God because they forget him. Jerusalem has filled the measure of her sins. Those who give up themselves to be ruled by their lusts, will justly be given up to be portioned by them. Those who resolve to be their own masters, let them expect no other happiness than their own hands can furnish; and a miserable portion it will prove.
Bloody city. That is, “a city of bloodshed,” or “a city of bloodguiltiness.” Judicial murders and the offering of children in sacrifice to Molech were doubtless among the crimes that earned for Jerusalem this infamous title.