It would be wrong to say I hate Christians. It would be more correct to say I hate Christianity. And then even more correct to say I hate all religions.
But I’ll humour you and answer anyway about Christianity;
Forcing billions upon billions of deaths
Slowing down human development by hindering science.
Actively causing AIDS to spread through Africa by making condoms “a sin” in the eyes of its followers.
The oppression of every single minority you can think of, along with the oppression of groups that aren’t minorities, like women, or poor people.
Condoning blind ignorance by calling it “faith”.
Mormons knocking at my door while I’m trying to eat.
I could go on, but what’s the point? A post on the internet isn’t gonna stop people from being ignorant. I don’t hate Christians, I just think they’re “silly” (I’m trying to be nice) for being part of that thing that is rightly hated by sane and fair people, just because they happened to be told by their parents/teachers/whatever to believe in the religion that just so happens to be the “right one” according to their location in the world, out of thousands of others around the world.