It is easy to imagine God hating people when we hear of His wrath and "vengeance is mine" and such like. But ultimately, God's wrath is simply the measure of His justice, the justice that He demands as the all-perfect Being. I'm not saying His punishment of the wicked is impersonal. There is nothing impersonal about God, that is the miracle of it, that He actually mingled however briefly in our lowly affairs, solely in order to save us, even consenting to humiliation and suffering and the experience of death. So when He punishes someone even this is colored by the fact that He wanted to give eternal life to this person who He now has to send to hell.
It is sort of like the emotion someone might feel who, in a famine, has to shoot their beloved dog, because that dog is starved and losing its mind and starting to look at the kids as if they were so many racks of rib.
Those who are in hell are there because they hate God, not because God hates them. And if you hate God, what is He supposed to do, let you into heaven anyway? They no more belong there than I belong in a woman's restroom. The separation between the children of mercy and those of wrath is just that distinct. The children of wrath are not fit to be in God's presence for eternity. They are cursed, but by their own choice, not by His.
It is extremely important to remember that God wants to save everyone, and this is at the root of all these disputes about grace. If you deny that God wants to save all, you are entering Protestant-ville. The question arises as to how He could have left so many people in darkness for so long before His Incarnation, and the answer is that He knew it would take a long time before people would be mentally and spiritually ready to be vessels of the Holy Ghost. If more people were ready earlier, Christ would have come earlier.