McBell
Unbound
Interesting how you do not even mention the biggest glaring assumption...To expound on my first comment, looking into the Bible. It gives us some really easy markers to see what true religion looks like. In fact there are 5 major points found in the Bible. The true religion meets all the requirements. No other religion on earth meets even one.
(Mods, whenever I quote the following scripture I get it deleted and warning points. It is just as good as the rest of the Bible. And it is answering the OP.)
1. The true religion would use Jehovah's name and proclaim it to the people:
For “everyone who calls on the name of Jehovah will be saved.” 14 However, how will they call on him if they have not put faith in him? How, in turn, will they put faith in him about whom they have not heard? How, in turn, will they hear without someone to preach? 15 How, in turn, will they preach unless they have been sent out? Just as it is written: “How beautiful are the feet of those who declare good news of good things!”-Romans 10:13-15.
Which religion not only uses God's name Jehovah, but proclaims it to the people? This is a mark of the true religion according to the Bible.
2. Base all their teachings on God's word the Bible, and not on man-made traditions and doctrines. -2 Timothy 3:15, 16. There are many religions that claim to follow the God of the Bible but how many of them have doctrines and follow traditions that are not found in the Bible or that the Bible out right condemns?
3. Remain neutral to the political affairs and wars and national conflicts of the world. Jesus said about his followers:
(John 17:14-16) I have given your word to them, but the world has hated them, because they are no part of the world, just as I am no part of the world. 15 “I do not request that you take them out of the world, but that you watch over them because of the wicked one. 16 They are no part of the world, just as I am no part of the world.
Which religion as an organization earth-wide are no part of the world. Have returned the sword to its place and learn war no more? Who do not participate in wars, or in politics to the nations? This is a marker of the true religion.
4. Have true love among themselves. Jesus plainly said that his followers would be evident by this fact:
(John 13:35) By this all will know that you are my disciples—if you have love among yourselves.”
It is a very short statement but a very powerful one. Which religion practices true love among its believers? Who refuse to go to war so they do not kill their brothers in other lands? Who have gotten rid of racial, national, and ethnic prejudices and hatreds? Who as a Christian organization earth-wide are united by love?! This is most key factor in all of these.
Others can argue dogma and false teachings all they want, but they still don't have the true love among themselves as the true Christian congregation does.
5. Preach the good news about the kingdom.
What is the good news? What is the kingdom? Who is preaching it to the people? This goes hand-in-hand with the first point as well. -Matthew 24:14, 28:19, 20.
5 simple key points the Bible points to who really practices the true religion. And only 1 religion meets all the requirements. No other religion qualifies with even 1. There isn't even really a question of who has the truth. And it is very evident to everyone that would study or investigate.
That Christianity is the "one true religion"