However, I might add that you did not even directly respond to my question: why should believers of Christ believe a revelation given to one man 600 years after the time of Christ with teachings that contradict what Christ and His disciples gave? Again, suppose 600 years after the time of Mohammad someone in a land far from Mecca in a different culture claimed to be in line with Mohammad and gave a revelation that contradicted what was taught in the Quran - should we simply submit to that person? What if those followers pointed to Muslim offshoots or heresies which existed around that time (and you know they did) as verification that their revelation should be trusted?
well , i will give you some reasons for why you can’t depend on your gospels .
We first start with the book of Matthew.
en.wikipedia.org/wiki/Gospel_of_Matthew
The authorship of this Gospel is traditionally ascribed to St Matthew, a tax-collector who became an apostle of Jesus. However, most modern scholars are content to let it remain anonymous.
The relation of the gospels to one another is the subject of some debate. Most modern scholars believe that Matthew borrowed from Mark and the hypothetical Q document, but some scholars believe that Matthew was written first and that Mark borrowed from Matthew (see: Augustinian hypothesis). Out of a total of 1071 verses, Matthew has 387 in common with Mark and the Gospel of Luke, 130 with Mark, 184 with Luke; only 387 being peculiar to itself.
Like the authors of the other gospels, the author of Matthew wrote this book according to his own plans and aims and from HIS OWN POINT OF VIEW, while at the same time borrowing from other sources. According to the two-source hypothesis (the most commonly accepted solution to the synoptic problem), Matthew borrowed from both Mark and a hypothetical sayings collection, known by scholars as Q (for the German Quelle, meaning “source”).
please take your time to read this link either
earlychristianwritings.com/matthew.html
This means, however, that we can no longer accept the traditional view of Matthew’s authorship. At least two things forbid us to do so. First, the tradition maintains that Matthew authored an Aramaic writing, while the standpoint I have adopted does not allow us to regard our Greek text as a translation of an Aramaic original. Second, it is extremely doubtful that an eyewitness like the apostle Matthew would have made such extensive use of material as a comparison of the two Gospels indicates. Mark, after all, did not even belong to the circle of the apostles. Indeed Matthew’s Gospel surpasses those of the other synoptic writers neither in vividness of presentation nor in detail, as we would expect in an eyewitness report, yet neither Mark nor Luke had been among those who had followed Jesus from the beginning of His public ministry.
again , you can read this link either
newadvent.org/cathen/10057a.htm
through reading in this article you can find out that the early Christians had a different version of Matthew than we have today , that’s why the Christians face problems on establishing what language Matthew wrote his Gospel in.
How can you rely on the accounts in these Gospels which are the basic Pillars of your Faith?