Is Israel right to bomb the arms trucks in Syria?
Yes, seeing as how they might later be used on them.
When is bombing someone ever right? Yeah, think about that piece of philosophy
The risk of bombs killing innocent bystanders is always a dangerous risk. They (bombs) don't discriminate when they explode. That is the sad reality.
The concept of self preservation has very wide latitudes based on past patterns of behavior, but common sense makes for a good yardstick.