They gained nothing by going throughout the world on difficult, tiring, and dangerous missionary journies to spread lies. All they got for their hard work was a bit of persecution. That alone is still strong evidence.
Is this not equally strong evidence for the numerous Gnostic and Jewish sects purged by the victors of early Christian sectarian conflict?
Is it not even stronger evidence for Judaism, repeatedly villified and viciously attacked by state sponsored Christianity?
Certainly Islamic martyrdom should be counted as
"strong evidence".
And what of Maghi (Mela Muktsar) and Guru Arjan Dev Ji, exemplars of
Sikh martyrdom? Is this not likewise
"strong evidence"?
And surely there exists no finer meld of inspiring miracle and martyrdom than the
Martyrdom of the Bb. How do we weigh this
"strong evidence" of the Baha`i faith?
Martyrdom is the province of sociology and psychology. Religious martyrdom is simply one manifestation of the incessant and pervasive willingness of untold numbers to die for a cause. The martyrdom of Polycarp no more validates Christanity than does the martyrdom of Al Qaeda pilots validate Islam.