It's ridiculous to pick on individual airlines when you have no idea what information they did or didn't have access to, on a given day.
The information was out there. Other airlines acted on it.
It's a load of ignorant crap suited only to after-the-fact experts and tabloid journalists.
Speaking as someone who works in the safety department of one of the airlines which chose not to fly over this region, I would say that a pro-active safety culture can generate the foresight required to mitigate the threat of being shot down over a war zone.