@Right_in_Virginia No, I'm not missing that. Every nation does it --- If memory serves, updating military arsenals and planes and ships helps the global economy go round. 
But, are there not rules about "mowing the grass", crossing borders at will to bomb weapons stored by sovereign nations, killing " terrorists" without capture, trial and conviction, and leaving more than 75,000 civilians dead, 174,447 injured civilians and 330,000 homes destroyed by military strikes in a three year battle of a 59 year war? ---- Or, am I wrong and there are no rules governing any of this?
Of course there are rules governing war. But those rules don’t begin on October 8.
Gaza had been launching rockets at Israeli civilians for years. Then, on October 7, Hamas and other armed groups crossed into Israel, deliberately attacked civilians, murdered roughly 1,200 people, abducted 251 and took them into Gaza. The UN documented murder, hostage-taking and sexual violence, including reasonable grounds to believe rape and gang rape occurred.
So let’s talk about your rules.
“Killing terrorists without capture, trial and conviction” is not automatically a violation of the laws of war.
That’s what war is. We didn’t capture every German soldier in World War II and put him before a judge before killing him. Enemy combatants can be attacked in an armed conflict. There are rules about who can be targeted and how, including protections for civilians and people who are hors de combat. But there is no general requirement to arrest an enemy fighter first and conduct a trial before engaging him.
The same rules apply to Hamas.
You can’t murder civilians, rape women, abduct people and drag them into Gaza, hold hostages in tunnels, and then invoke the laws of war as though they apply only to Israel’s response.
And your Gaza casualty figures, however tragic, don’t answer the question. They tell us the cost of the war. They don’t establish that every Israeli action was unlawful, and they don’t erase what caused the war.
Israel has an obligation to protect its own people. After October 7, it has every reason to make itself more secure than it was on October 6.
That’s not some sinister Israeli doctrine.
That’s what a nation does after its civilians have been attacked.
If you want to challenge a particular Israeli operation under the laws of war, then make that specific argument.
But don’t tell Israel it has no right to fight because war is dangerous to civilians.
If you don’t want civilians killed in Gaza, don’t start by murdering civilians in Israel.