Actually the statement by Jesus Christ that He is the way the truth and the light and that no man comes to the Father except through Him sort of makes other religions moot though doesn't it? That very statement puts other 'religions' on a lower level than Christianity. Course if you want to worship a tree or some statue that's your right and makes no difference to me.
your quote is correct but your conclusion is flawed. Jesus, James, Peter, John, and the rest of the disciples were all Jews and were never Christians. Thus, I think that they were followers of Jesus of Nazareth, not Christians, per se.
Don't you think that Jesus is above all the religions, including Christianity. Put it this way - would you die for Christianity, or would you die for Jesus; and, are they the same thing?
In Acts, did the Apostles say, "In the name of Christianity, pick up your pallet and walk!"; or did they say, "In the name of Jesus, pick up your pallet and walk"?
And, to 80+% of the world "Christianity" means Hollywood, porn, graft, corruption, taking advantage of the poor, capitalism, etc.
Names and definitions change over time. 100 years ago, Christianity meant a "follower of Jesus of Nazareth". Now, it is aligned closely with America and how the rest of teh world views our CULTURE.
100 Years ago, if I told you that I was a "gay man", you would think that I like to dance and go to movies and parties and had many girlfriends and interests. Now, if someone is a "gay man" they are homosexual.
SO, words and definitions matter and although you and I agree what "Christian" may mean to both of us, about 4 billion people may not agree with our definition.
Just food for thought...