"hating the sin, but not the sinner sinning" is not Biblical. Both testaments clearly state that God hates the sinner, and he loves the righteous. period. God has created a heaven for the righteous, and a hell for the sinner, he did not create a hell to punish sins, because a sin or action by itself cannot be punished, the sin is always attached to the sinner whom is responsible for doing the act. Think, if a robber robs a bank, the law cannot separate the robbery action from the robber whom does the robbery, as, "Shame on you robbery, bad robbery whom robbed from others." No, that's nonsense which cannot save the robber from their robbery. Instead the law rightly punishes the robber, because you cannot punish a robbery, for no robbery is not attached to any doer of it. The doer rightly is condemned, and not the action itself.
When God Almighty commands all flesh to repent and to be holy, his commandment is not a request to his creation, nor is it even a suggestion, but a clear cut commandment from our Creator to his creation. "You repent and be holy, because I your God am holy." And if we refuse the Almighty's direction, then we receive his Judgment, and are separated from him, and receive his wrath and destruction from him and not his love and life. Think, if you have children and you Tell them, "Be good Johnny, or, Be good Mary." And one child listens to you and does good: would you be pleased with them? Yes? Ok, now let's say a child refuses to listen, and instead they curse both you and other people, and also is physically abusive and violent and hurts people, and lies and cheats and robs, and also kills your child: would you be pleased with them? No? Okay. Now let's say, the evil child realizes their disobedience to "Be good", and feels bad about their disobedience and about all of the destruction that they have done, and apologizes begging for forgiveness, and then starts "Being good": would you continue with your displeasure, or, would you instead change and be pleased with the child whom has repented and is now "Being good"? It is the same with God, He Tells us, "Be good, be holy, and be righteousness, both to me first and also to others." And if we refuse, and live for the devil, than our actions are what we are, whether a beloved child or a despised child. And according to our works determines whether we abide in heaven with the other saints and sit at his table with the family of God, or else be tormented in hell with the other violent sinners whom disobey God and whom hate Christ and his holy children.