Dear Madam - Shalom/Peace
It is true that God is watching us, and it is to Him that all of us are to leave final judgment on motives. Meanwhile, we must struggle along with the limited knowledge and insight we have. However, it’s another thing to accuse others of abusing someone like Mohammad, and demanding death for such statements via fatwahs, when the accused have quoted from the ahadith and from the holy Quran. That amounts to denying those sources.
For instance, Muslims consider non-Muslims as unbelievers, of course. However, in a good numer of places in the Quran, one reads saying, in effect, “Slay the unbeliever!” These saying of the Prophet outnumber by far his earlier peaceful sayings and carry more weight. So in Muslim countries, following Sharia law, non-believers are first invited to become Muslim; if they accept, all is well and good. If not, they must pay the jyzra tax, and accept any humiliation without complaint. If they protest, they can be (and are) punished. If they refuse, they must leave the area or face persecution and/or possible death.
All of this is taught in mosques whose imams are faithful to the Quran, and has been documented in the historical record. To speak this truth is to respect it. To accuse those who speak it as being abusers of the Prophet, is to disrespect the Prophet, because his sayings are enshrined in the Quran, and expanded in the ahadith. To point out that he commanded unbelievers to be slain is to speak the truth, and is not an abuse of Mohammad nor of Islam. To claim that such speaking is an abuse not to be tolerated amounts to saying that the Prophet did not say such things. Such a claim would be an untruth, since in the Quran we find this and many other like things that the Prophet DID say.
And to cite these other things is not a condemnation, either. The Prophet did say them, and his followers accept them. Those who do not follow Mohammad do not accept them, and say so. For that, these have been condemned to death by Islam more than once. [eg., Rashid]. So Islam also disrespects unbelievers and critics.
So please do not imitate those whom you accuse of writing nasty notes, and judge them as intending to be disrespectful. They do not have the background of Islam as you do, just as you do not have the extended knowledge of Christianity that they do.
A long reply, this; I hope it helps.