Yes, you are right about that. But some claims of history can be easily dismissed because of contradictory facts. For example, the Lost Tribes of Israel as taught by those golden plates have been disproved due to DNA evidence. That calls into question the claims of authenticity. What I have suggested here is that some of the basic facts about Christianity are historical such as the life, teachings, death and resurrection of Jesus. These are, of course, disputed. But so are some of the "facts" reported about Julius Caesar and other historical persons. There is a deep body of analysis that uses all the tools used to determine whether something is a historical fact or not that supports the basic Christian claims. There is also a deep body of analysis that disputes those facts. None of those, in my opinion, have been sufficiently established to incontrovertibly overthrow the supporting evidence. To you, they most certainly have and I respect that. I merely want to point out that while much of Christian belief may be open to theological interpretation, some of the beliefs belong in the realm of history and can and should be subjected to the analysis appropriate to all historical claims.