One of them you seem to have grasped, then dismissed for no apparent reason: If this assassination leads to war, who will have caused those deaths?
Like the war with North Korea that Trump started
You never seem to comprehend that NK & Iran are two very different situations and enemies. Nobody with any knowledge or power or influence has advocated a US war with NK. Mostly because they already have nukes, but also because 1/2 the population of SK is just across the border and lots of US troops are right there too. Trump recently was shown a map of the Korean Peninsula and was shocked to learn the Seoul and tens of millions of South Koreans are way up north by the border.
Otherwise there is little to gain form confronting NK -- they don't have oil, they barely have an economy -- even SK is in no hurry to merge with them even if it were possible. And besides, being a paranoid autocracy, NK is unpredictable and there's nothing that would fill the void if the leadership was removed or the country defeated.
Iran otoh, actually has a functioning democracy subsisting beneath a theocratic layer, so there is already a political infrastructure that could take over if the mullahs and their revolutionary guard were removed from power. Iran also has plenty of oil wealth -- I believe the 2nd largest proven reserves behind the Saudis. And a functioning economy, though currently hit hard by economic sanctions, but still is a place where lots of Western countries would love to do business with.
Iran also has a very youthful, restless population, plus many ethnic groups not exactly fond of the Shiite theocratic status quo.
It's easy to see how one could talk themselves into invading Iran or otherwise trying to overthrow the religious gov't. And indeed there have been plenty of folks, neo-cons, McCain, etc who have advocated invading Iran for decades now. If Iraq had worked out as dreamed -- as some sort of ME oil colony of the US, making fists full of money for oil companies and not just weapons-makers, an Iran attack probably would have happened by now.
When Trump pulled out of the Nuclear Deal and pressured Euros to join the boycott, Iran was left with the worst hand -- not having a nuclear program which could be used as a bargaining chip or to develop nukes to prevent any attack, combined with harsh economic sanctions. There only cards to play are using their proxies to disrupt things across the ME, and to cozy up to Russia (they are semi-allied in Syria) and China (a potential last resort buyer of Iranian oil). And the final fallback is the large population and territory.
It's facile to equate North Korea and Iran simply because they are both US enemies. They present very different problems. I'd argue that war with either is unreasonable and dangerous and almost certainly counter-productive. But a US war with Iran is is conceivable and could be ginned up. And the Suleimani assassination could be the prelude. A war with NK isn't on the table.
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