Israel and Syria

There's a reason for the silence with regard to Israel's air force raid which took place on 9/6, but we may not know what it is for a very long time, if ever.  Best guess according to Bret Stephens in the WSJ is that the Israelis were destroying nuclear material.  I have no trouble believing this:

More questions will no doubt be raised about the operational details of the raid (some sources claim there were actually two raids, one of them diversionary), as well as fresh theories about what the Israelis were after and whether they got it. The only people that can provide real answers are in Jerusalem and Damascus, and for the most part they are preserving an abnormal silence. In the Middle East, that only happens when the interests of prudence and the demands of shame happen to coincide. Could we have just lived through a partial reprise of the 1981 Israeli attack on Iraq's Osirak nuclear reactor? On current evidence, it is the least unlikely possibility.