People often complain that Christians are narrow-minded and that they need to accept that there are other ways. The issue, however, isn't that Christians are narrow-minded - it's that Jesus Christ Himself says, there is NO other way:

"I am the way, and the truth, and the life. NO ONE comes to the Father but by ME." - John 14:6 (emphasis mine)

This is why His disciples echoed the same point:

"And there is salvation in no one else; for there is no other name under heaven that has been given among men by which we must be saved." - Peter speaking of Jesus Christ in Acts 4:12

There is only one way, receive the free gift of salvation offered by God through Christ and know eternal life, or pay the wages of your sin.