That's it? Love is slaughtering your children?
I suspect you're just being reductional there, and I probably shouldn't respond. But let me try anyway, since it's just possibly a genuine concern for some folks, and in case you're being sincere...
In Christian thought, Jesus Christ IS God. (You may not agree, but hear me out). That's important to understand. He isn't some secondary projection of the Divine, but literally "God manifest in the flesh," as the Bible puts it. If God sends
Himself to save you, and you crucify him...who's that on? And if He knows you're going to do it, but comes to save you anyway, how does that change the picture?
Love is sacrifice. It means the giving up of oneself and one's privileges for the good of another. And that's true in human affairs too. When one gets married, one (at least promises to) be committed to "forsaking all others," which means an exclusive commitment to one person. That's a sacrifice. And when parents have children, they know that it's going to cost them...not just in money, but in time, energy, options and probably heartache. But they do it.
Now, I don't mean to belittle human love too much, but it is what it is: and let's face it, it's rarely fully self-sacrificial. Usually we're looking at the other person to do something for us, or to live up to some expectation, some bargain; and when that stops, our love diminishes a bit. But in some cases, such in case of perhaps, a truly loving parent, it may go further. For someone one has genuine reason to love, one may even agree to lay down one's life.
But who will die for a bad person? And not someone just a little naughty, but rather the sort of people who want nothing to do with you, and in fact would gladly spit on you, insult everything decent and nail you to a piece of wood to put you on display. How many people would die for other people who were like that?
The point, then, is that God's love is far beyond our human frame of reference. It puts Himself on the line for the good of those who care nothing for Him. So human love is good, yes; but it's not "good" like that. That simply transcends human love.