Lazoglu, thanks for your detailed explanation, it helps an outsider like me understand Turkish concerns. Like 123456, I also believe Israel should not be an enemy nation. Even Israel is considered an enemy nation for the time being, a removal of this thug regime with a democratic one, dominated by Sunni majority, will result in more effective negotiation with Israel and also correct some imbalance, which was created by removal of Saddam Hussein in Iraq (thanks to GW Bush the great idiot and war criminal), namely the increasing influence of Iran and its meddling in the region.
About investment in Syria by Turkish businesses, opening up borders etc. this was an admirable effort and I support it wholeheartedly. When the Arab spring started Assad had the choice to save his regime and become a model. Turkish politicians tried very hard to convince and bring him to reason, but Assad and his whole clan, I think is scared that once they loose power in a democracy to the majority Sunni's, they will be persecuted for what his clan did in the last 40 years, which is not unfounded, so he decided to exterminate his opposition. One would think that he was better than Gaddafi, but he turned out to be similar if not worse, a more suave, sweet talking, younger, professional looking and better looking version of Gaddafi. So he has already dug his grave, no one can save him anymore. He is history. The question is whether he will take down 50,000 or 100,000 Syrian lives with him.
I understand your concern about loss of valuable Turkish lives, loss of equipment, ammunition etc., wars are never cheap, but several things will happen here, I think. First, Turkish Army is not going to go in, I believe, even if they do, it will be limited to creating a small buffer zone. Second, the war will be an insurgency war, mainly fought by Syrian Army defectors and volunteers trained in camps in the buffer zone, inside Turkey or Jordan. And I believe GCC will bear the bulk of the cost. I have also heard that they will recruit volunteers from other Muslim (I would guess Sunni) countries. So the cost in terms of finance or lives could be not as high for Turkey. But in return, the geopolitical benefit could be huge. I personally feel that it will increase standing of Turkey among Muslim countries (except for Iran, Iraqi Shia and Hezbollah) and will finally give Turkey the opportunity to establish a model of its own democratic system of govt. right next door, which can be followed by Bangladesh, Pakistan and the Central Asian stan's in a Turkic Spring.
I also understand that its a bad moment in Turkey, considering the turmoil within top brass of the armed forces, but crisis does not wait for anyone, that is why readiness is important.
About Debka being the only source, I actually heard it from another source, that matches with this Debka article. But who knows what will really happen, Turkish Ambassador has to be withdrawn and Obama and His Highness Prime Minister Erdogan, both will need to explicitly call for Assad's ouster, so we will still have to wait a few days to find out if something will happen at the end of 15 days given to Assad, or some time after that.
This whole thing could be just a deliberately leaked and spread rumor to pressure Assad govt.