I think the concern here is a reasonable one, though I see it as an issue of tone rather than content.
I'm reminded of the story that Martin Luther was scandalized, upon opening a copy of Aquinas's Summa Theologica, to find that great saint declaring "It would seem that God does not exist" (!). This may not be a true story - I don't know. At least, Erasmus of Rotterdam was moved to explain to him "the difference between refuting and propounding, between argumentation and pronouncing judgement ... From a scriptural quotation [Aquinas] draws a false conclusion, sometimes even a blasphemous one, and we recognize that it is legitimate to do so in the arena of debate." (Hyperasperites 2, 1527). Of your four example questions, at least three are being asked by believers. But even if that were not the case, I don't find anything improper in the questions themselves.
That said, the fact that you feel somewhat besieged is worth noticing, and it may be indicative of what new users or visitors see. Perhaps we have a glut of questions at the moment where the tone seems to put us on the defensive. If that's so, then I think the remedy is to ask a few more "positive" questions (rather than try to get rid of these others).