If e.g. Finland or Estonia started to shoot rocket artilleri towards St Petersburg, the reaction would certainly be much worse than Israel's at Gaza...
(And because of Karelia etc for Finland and generations of slavery for Estonians, they have as good reasons as the Gazans.)
The situation is:
Side A attack side B's civilians. You only complain about side B's quite moderate defense against A's attacks. (Again, installed to stop the attacks.) Then you motivate that further attacks from A are understandable, because of B's defense.
It is such a sad case of hypocritical and hateful circular logic I get vertigo. :-(