See you have a mixed up viewpoint there that's hard to follow. A shoot down like this is extreme, so you can't remove Turkey's moral responsibility. Most countries would not have done this.
It's not about proving who was 'right'. You need to get a grip of what this situation is- it's nothing to do with a trivial border overfly that no-one would normally care about. It's about Turkey taking any chance it gets to take a shot at Russia over the Turcomen bombings, hiding behind a technicality to legitimise it.
Now, yes, Russia plays that same game of technicalities all the time- fair enough,. But first, two wrongs don't make a right- and the idea that it is ok to kill someone just to make a point of bravado on the ground s that the other side took the risk with the lives is very dodgy, morally- and second, don't mix up what it is you are approving here. You justified the shoot down on the grounds that it would stop Russia doing it again,. This is untrue. It just means Russia will shoot back next time and really there will not be any clear picture of 'who was right', seeing as Turkey already looks like they set this one up and Russia will have a fair claim to defend any of its planes attacked over Syrian territory. And don't be any under illusions here- if it comes to a strategic air conflict between Turkey and Russia, Russia wins.
But the main reason there won't be a next time is that NATO will now be tearing strips off Turkey behind closed doors to tell them to stop doing it.
Turkey have taken their one shot they can get away with.