As for the sacrifices of my offerings, they sacrifice flesh and eat it; But Yahweh doesn't accept them. Now he will remember their iniquity, And punish their sins. They will return to Egypt.
"Now will I remember their iniquity ..." The emphasis here is upon the word "now."  The day of grace was past.  God had exhausted every possible means of winning the wayward nation back to any acceptable loyalty to himself.  Nothing was left except to order the punishment.  As dramatically stated in  Hosea 8:3, "Let the enemy pursue him."