[caww]

Christianity is alone that claims that her tradition is a historical fact,

That is a lie....the scriptures are very clear about following the "traditions of men"... Jesus warns Christians time and again not to do so..... But you can certainly state that catholicism does claim 'their traditions' as a historical fact. Don't confuse the difference.

[annalex]

....the scriptures are very clear about following the "traditions of men"...

That is true, and indeed traditions of men should not be blindly followed. Tell it to the followers of Calvin and Luther.