The following considers the strength of the evidence, it ranges from as certain as anything can be that occurred so long ago, to questionable in the sense of few or no primary records and contradicting secondary records.
https://www.reclaimingthemind.org/content/Parchmentandpen/DeathoftheApostles.pdf
With regard to our conversation, I accept your clarification that you never intended to imply that a person merely had to “be” a spiritual brother and that it is important to be a doer. If you sincere in this clarification, then the martyrdom of Jesus’ brothers is strong testimony that they were spiritual brothers. At least, this seems logical to me.
I accept, by your non-reply, that Jesus certainly never rejected his mother.
With regard to showing me the truth of the Bible, one source of truth is the consistency of what’s in the Bible with other records. In the context of this conversation, the evidence - again ranging from very strong in some cases to somewhat speculative in other cases - of the martyrdom of the apostles. If the Jesus story had been made up, why would these men have put themselves at the risk of martyrdom?
Perhaps you know the origin of the word martyr. But, it it reassuring, every know and then, to remind yourself of it.
http://en.wikipedia.org/wiki/Martyr
Where is your evidence that Jesus' brothers were martyred??? What about his sisters???