I honestly don't understand your logic here at all. You think the fact that the infiltrators were using donated NATO vehicles is somehow going to act as a causus belli to drag NATO directly into the conflict? Am I understanding you correctly? Because that's... not how that works.
I am curious though what Ukraine's high command thought the worth was in throwing dozens of men and several vehicles away in a doomed attack like this. The PR? For who? The NAFO crowd on Twitter are cheering and smugging it up as usual, but they're always doing that, and will continue to find an excuse to do that even if a Russian flag were flying over Kiev by the end of conflict. Their soldiers? If I were a Ukrainian soldier, any morale boost that might have been gained from this operation would have be more than offset by the realization that my commanders would send me to certain death for a quick propaganda story. I just don't understand what they were going for here. Maybe they genuinely thought they could seize the strategic missile base?