You just deliberately don't post how it is supposed to happen, because you know it is the truth and it totally takes the rug from under your silly argument. So again, I will put it back into context for you. (note how you again are repeating the same inane "fear them!" argument that has already been shown as weak as a 2 year old in a WWE wrestling match?)The actual teaching is that they are to bring the world under the noahide laws which do prescribe decapitation for transgression. The truth renders your post a batch of non-issues.
They are supposed to do it by simply 'acting morally' which will make us all follow the Moshiach when he finally arrives because we will recongnize how benevolent he is.
Actually read the book, instead of actively ignoring the teaching.