Hindus don't. Muslims don't. Atheists don't. Buddhists don't. Why can't Christians build their own moral strength? And look at how many Christians are corrupt and immoral, how do you account for these people following Jesus?
What do you mean?
Christianity is a unique approach. Many Christians may be corrupt but hopefully they are better than they would be without their religion. We are just trying to do the best we can to help humanity. And yes there are wolves among us making us worse.
I'm just saying when I've talked about the underlying principle of the Church of Jesus Christ of Latter-day Saints, the plan of Salvation, I feel I've defended it quite well on the Internet.
Unfortunately the wikipedia page isn't very good so let me try to explain it.
We existed as intelligences in the pre-mortal existence. We were to go to earth to be tested to see if we would show ourselves worthy of coming back to God's presence. Some of us followed Lucifer and wanted to have no choice; they never made it to earth. When we come to earth we forget what happened before so we can be tested properly. The Spirits that didn't make it try to get in our way. Other spirits try to help us. When we die our bodies go to the grave and our spirits go to spirit prison or paradise. Those in paradise preach to those in prison and they will know the truth and it's not to late to accept it, but it's harder to repent without bodies. At the judgement our spirits reunite with our bodies. Everyone becomes immortal but we go to different places based on how we judge ourselves. In the highest place we can create our own Universes under guidance of God.