not be offended. If any one from Catholic comes to me and preach their religion to me, i have answers. I can tell them i am muslim and I am practicing Islam and i am sure that it is 100% true so there is no reason which will make me offended.

I am not forcing any one. Yeah you are right no one in this world is 100% right that is why i accepted Islam because i am sure only Allah can be 100% right no one else ;) you can refer Quran, Allah's words