A couple of years ago, and a Christian, I had a problem with witnessing because I felt others had a right to their beliefs and who was I to tell them different (even knowing that belief in Jesus Christ was the only way). And I was having this discussion with the Father one day and He brought me up short. It was almost an audible voice. "You have the right to tell others because this is the only truth. This is the only way! Don't worry about hurting their feelings." Christians have the only truth.

Also, how can anyone doubt the Word, which has survived by God's will so many thousands of years - and plus all the prophesies that have been fulfilled. Nothing else has that proven track record.