Should we have a Monolithic world

How we define Religious Tolerance?

I guess, religious tolerance is to allow other religions to co-exist and respect that they have their own right to follow their own faith.

If this is so, why some religions are converting the rest of the world to itself? Please do not get emotional, lets look at this at a very rational way.

If we think one religion is very great, that you feel is the best one to follow, would it not automatically observe people to it?

If this is considered true why do we need conversions?

I feel, the necessity of conversion should have existed when the religion started(evolved), where you would have very few people following it. So, feeling insecure that it might get destroyed, we convert others to it and prevent our religion from extinction.

Lets take the case of Christianity:

Since christianity is the major religion followed by the entire world why would we need to convert others into christianity, if others feel it(Christianity) is good they would automatically start following ours(Christianity) and become a christian!

Why do we still have the same fear to get all others converted! Why huge machineries with so much funding to make this world a christian world.

Imagine a monolithick world of single religion ! Would it not be boring! When we have no choice? I would definetly not prefer it!

I am pained to see the bakbone less Hindus are getting easily converted to christianity for money! (Yes, some missonies offer money if some one gets converted to their religion and this happens in India).

I feel very bad that at some time we would never have any choice to follow a different faith except christianity.

How do you feel in such a monolithic world!