Contradiction with Hosea 1:6-7
God expresses mercy towards the house of Judah while in Hosea 6:10 He condemns the house of Israel for harlotry.
Hosea 1:6-7: And she conceived again, and bare a daughter. And [God] said unto him, Call her name Loruhamah: for I will no more have mercy upon the house of Israel; but I will utterly take them away. [Loruhamah: that is, Not having obtained mercy] [no...: Heb. not add any more to] [but...: or, that I should altogether pardon them]
Contradiction with Hosea 11:8-9
God speaks of His compassion and promises not to utterly destroy Israel, contrasting Hosea 6:10 where the actions of Israel are described in negative terms.
Hosea 11:8-9: How shall I give thee up, Ephraim? [how] shall I deliver thee, Israel? how shall I make thee as Admah? [how] shall I set thee as Zeboim? mine heart is turned within me, my repentings are kindled together.
Contradiction with Jeremiah 31:20
God mentions His yearning and mercy for Ephraim, whereas Hosea 6:10 highlights the iniquity in Israel.
Jeremiah 31:20: [Is] Ephraim my dear son? [is he] a pleasant child? for since I spake against him, I do earnestly remember him still: therefore my bowels are troubled for him; I will surely have mercy upon him, saith the LORD. [are...: Heb. sound]
Contradiction with Ezekiel 18:21-22
Promises forgiveness if the wicked turn away from sin, which contrasts with the condemnation of Israel in Hosea 6:10.
Ezekiel 18:21-22: But if the wicked will turn from all his sins that he hath committed, and keep all my statutes, and do that which is lawful and right, he shall surely live, he shall not die.
Contradiction with Isaiah 1:18
Invitation to reason together with the promise of cleansing, which contrasts with the condemnation in Hosea 6:10.
Isaiah 1:18: Come now, and let us reason together, saith the LORD: though your sins be as scarlet, they shall be as white as snow; though they be red like crimson, they shall be as wool.