I'm glad you read my post.
Let's review what actually has been posted in this thread.
You post a brief extract from Richard Gabriel's book 'Islam's first General', I posted a longer and fuller extract from Sir MZ Khan's book, 'Muhammad, Seal of the Prophets'.
In the first Gabriel says the soldiers sent by Muhammad, pbuh, are 'killers'. He does not say that Uzair/Yusayr/Aseer/Basheer bin Razam/Razim (same person, just different spellings in different accounts) was not a military commander or that his entourage were not soldiers - i.e. he does not contradict the longer account in Khan's book.
You've ever since blustered and blubbed about providing references - but I gave you a fuller reference than you did (you didn't bother to name the author in your post, or give a link - but it is easy enough to find on Google books).
Gabriel doesn't call Usayr an 'unarmed diplomat' - that's your spin. (Although, I suspect you've just copied this from an I-spy-book-of-Orientalism website
Therefore, by my reckoning I've more than matched (if not exceeded) the standards you've practiced and have repeatedly invited you to provide some new evidence. Thus far we only have your quote from Gabriel's book.
Over to you, mon ami.