Not everyone thinks of Christianity as the ONLY way.Being modern is not the goal of a Christian or Christianity itself.
The goal is to sanctify the soul through truth (John 17:17)(2Tim.2:2).
The goal is for the soul of man to go to heaven after the death of this physical body (temple) we live in today (Matthew 25:33-40)(Luke 16:19-31).
Christianity is a spiritual kingdom (John 18:36)(Luke 17:21).
36 Jesus answered, My kingdom is not of this world: if my kingdom were of this world, then would my servants fight, that I should not be delivered to the Jews: but now is my kingdom not from hence.(John 18:36)
21 Neither shall they say, Lo here! or, lo there! for, behold, the kingdom of God is within you.(Luke 17:21)
It is only through Jesus that the soul of man can be saved (John 14:6) There is no other avenue by which the soul can be saved.
6 Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.
No other man has ever made this claim,only Jesus.
21 And she shall bring forth a son, and thou shalt call his name JESUS: for he shall save his people from their sins.(Matthew 1:21)
Please check out these good bible lessons.
Faith ought to teach you tolerance of other nations religion.