Commentaries
4:1-5 Hosea reproves for immorality, as well as idolatry. There was no truth, mercy, or knowledge of God in the land: it was full of murders, 2Ki 21:16. Therefore calamities were near, which would desolate the country. Our sins, as separate persons, as a family, as a neighbourhood, as a nation, cause the Lord to have a controversy with us; let us submit and humble ourselves before Him, that he may not go on to destroy.
2. they break out—bursting through every restraint.
blood toucheth blood—literally, "bloods." One act of bloodshed follows another without any interval between (see 2Ki 15:8-16, 25; Mic 7:2).