I don't think it is in any way proportionate but I don't think it is unsurprising. The Israelis are doing what they are doing because they have the military power to do it, because the attack in October last year gave them an excuse to do it; and because nobody is going to stop them doing it: nobody in the West; nobody in Russia or China; nobody in the Arab world. Iran may launch a few tit-for-tat missiles, but can't do anything significant abd are orobably more concerned about the internal security of their problem regime
Hamas has not got the resources to defend the people of Gaza from being murdered by the Israelis. It hasn't even got the resources to protect its own leadership from being killed.
The attack last year was from a marketing perspective spectacular; from a moral perspective wicked, as is the ongoing Israeli slaughter; and from a tactical perspective an absolute disaster.