Calvinist "proves" Love Omnipotent doesn't love everyone:
Three assertions are made, generally, by Christians:
1. God loves everyone.
2. God can save anyone.
3. God's love never ends.
Only two of the above statements can be true at the same time if we assume that there are some who will not be saved (which is to say that we are not universalists). If God loves everyone, and if God can save everyone he loves, and if God does not change his mind about his love, then everyone will be saved. We know that not everyone will be saved, therefore the above logic cannot be entirely true.
If we say that God loves everyone and that he can save anyone, but we reject the third option, then it becomes possible for God's love to fail, perhaps at the moment of death, causing souls to perish. Unfortunately, it means that we who ultimately are saved remain forever in jeopardy of him changing his mind.
If we say that God loves everyone and that his love never ends, but we reject the second option, then it means that God is powerless to save some, who ultimately perish. This denies his omnipotence, and it leaves us with a hand-wringing God who's too ashamed to admit that he can't handle the challenge.
If, however, we say that God's love never fails and has no end, and that he has the full power to save those whom he loves, then we must reject the first option, or else all souls would be saved.
So we're left with a choice from these possibilities:
1. God was lying about Hell, and no one really goes there.
2. God is fickle. Somewhere along the course of eternity he can, and probably eventually will, change his mind and condemn us.
3. God is weak. He can't do a darned thing about saving some of us.
4. God doesn't love everyone.
The Calvinistic choice is number four. You may not like it, but the logical alternatives are much worse. Most likely you thought to assert some other option that wins from every angle, but there is no such option. If you thought to embrace the notion that God loves everyone forever and can save anyone (but doesn't), then you embrace a logical contradiction, and your position has no merit.