Every worldview has its ambiguities - debatable elements that people simply will not see to eye on. There's nothing wrong with that as long as the disagreement is principled and dignified. I actually think that arguments - as opposed to quarrels - are good things because they're the best way to figure out what's true. Share your reasons, listen carefully to each other, be nice, and may the best idea win.

Sometimes (at least in principle) God might allow some evil because doing so will prevent a greater evil, and sometimes He might allow evil because it will produce a greater good.

Cursed is everyone who hangs on a tree.

When God's children disobeyed their heavenly Father, they damaged everything. When Adam and Eve rebelled against the King of the universe, they broke the whole world. This is why there is evil and suffering. Bad things happen in a world that's broken.

Worldviews have four elements that help us understand how a person's story fits together: creation, fall, redemption, and restoration. "Creation" tells us how things began, where everything came from (including us), the reason for our origins, and what ultimate reality is like. "Fall" describes the problem (since we all know something has gone wrong with the world). "Redemption" gives us the solution, the way to fix what went wrong. "Restoration" describes what the world would look like once the repair begins to take place.

Evil did not catch God by surprise. He had a rescue plan, and He's still in the process of working out His plan.

Christianity is actually "true Truth," as Francis Schaeffer used to put it. God really does exist, Heaven actually is real (along with Hell), Jesus really did live and He did the things the historical records - the Gospels - say He did, the resurrection of Christ really happened, and there really is hope each of us can count on for "the kind of perfect world our hearts have always longed for."