This is all completely false, as is every other part of your strawman satirization of what you call “skeptics.”
The scientific mindset quite readily accepts the possibility of extraterrestrial life as not only plausible, but as a virtual certainty. The probelm with hypothesizing UFOs as “alien spaceships” is not predicated on an assumption that aliens can’t exist, but upon the extreme distances between stars, and the enormous amount of time (on the order of centuries or millennia) and resources it would take to travel between them. It’s VERY likely that life has arisen and evolved elsewhere in the universe. It’s extremely UNLIKELY that any of those other lifeforms would be able to even LOCATE other life, and astronomically unlikely that they would expend hundreds or thousands of years (as well as the amount of resources it would take to stay alive and get here).
That means that alien spaceships, while not absolutely impossible, are by far, the LEAST likely explanation possible for seeing an object in the sky.
Your notion that anyone is “offended” by supernatural propositions is also completely off base. Not taking a hypothesis seriously is not the same thing as being offended by it. You actually sound like you’re the one who’s offended.