The Israeli response it pretty funny actually. According to them it’s just not a big deal:
In the first reaction from an Israeli official to Wednesday night’s alleged IAF foray over Syria, Science, Culture and Sports Minister Ghaleb Majadle said Friday that IAF planes enter Syrian airspace on a daily basis, adding that he did not believe the latest alleged incident would spark off a war.
Majadle told the Nazareth-based A-Sinara newspaper that while he had no specific information about the latest alleged operation, it was likely that “the planes either entered Syrian airspace to take photographs or in error.”
So they were either spying or there accidentally. I’ll let you decide which.