RE: What confuses you about Christianity?
The way I think about it is God knows every possible result of every possible choice, but you can still choose. Like the author of a "choose your own adventure" novel or a game designer or something. I don't have theological backing for that, but it makes sense to me. But Christians who condemn gays are not doing what God calls us to do, which is to love everyone. It’s sad that people who claim to love God do things like that, but unfortunately that happens.
As for death penalty, nowhere does the Bible say humans can not take life. God calls us to be merciful, but that doesn’t mean people can go unpunished when they commit a crime. I am personally against the death penalty, but hat doesn’t mean all Christians have to be.