"His disciples went to their deaths because they held firm to the resurrection of Jesus, having seen them with their own eyes."
Nope. They didn't. The only apostles who New Testament authors claim died as martyrs were Peter (obliquely referred to at the end of the Gospel of John) and James the son of Zebedee (in the Acts of the Apostles, which originally also claimed his brother John died with him, according to the Catholic theologian Alfred Loisy).
Any other references to the martyrdom of apostles or disciples comes from late 2nd and early 3rd century "Acts of (John, Thomas, Peter, Matthew, etc.)" literature, which contain little more than pious legend. Have you read any of them, knowsnothing1?