It seems logical to say that no one would be willing to suffer and even die for something they knew wasn't true.
According to the New Testament, the disciples were persecuted for proclaiming that Jesus was resurrected. Therefore, isn't it logical to say that the New Testament information has to be true?
The willingness of an individual to suffer and die for a particular cause or belief doesn't prove its truthfulness or validity. For example, the willingness of the leadership of the early Mormon church to undergo persecution and even death doesn't prove the veracity of the Mormon faith system. Likewise, the New Testament description of some of the disciples undergoing suffering or death does not prove that what they preached or believed was true either.