You want to know... go to one with an open mind, not just to trash the people or the religion.
The main reason for burning and taking all of the other shaman, Buddha, etc. etc. is because of the commandments in the Christian religion.
The 10 Commandments: The first 4 deals with your relation to God.
1- You shall have no other gods before me
*meaning... anything that you consider a higher being will be removed
2- You shall make no idols
*anything that you worship; celebs, politicians, trophies, etc. etc.
3- You shall not take the Lord your God in vain
* misusing God's name... e.g. 'god damn it', 'for god sake', etc etc
4- Keep the Sabbath day holy
* keep the 7th day, holy... this is when God rested after creating the world.
If you can't do these four thing, you shouldn't convert.