Why would they do that? The kidnappings?
We know that you shelter, aid and supply "palestinian" terrorists.
We know where you live.
The exiled leader of Hamas lives in Damascus under the protection of Assad. Syria is widely known to actively support Hamas.
In this flyover, Israel is warning Syria to rein-in Hamas... if they don't want Assad's estate to go kablooey.
Sort of a telegram, means you are walking on thin ice.