It doesn't matter what Trump did. Iran shot it down. Not Trump. It's like being in a fight and then punching a bypasser then blaming it on the guy you're fighting with. Iran is at 100% at fault, and every time people say, "Fuck Trump for starting this" it gives the impression you're not really putting the blame on Iran. They did this. Have your issues with Trump and the United States but THEY DID NOT DO THIS.
They lead to it.
The US is partially responsible for creating Al Qaeda and ISIS by arming rebels in Afghanistan and invading Iraq and knocking over the government. Just because they didnt directly form those groups doesnt absolve them of indirect blame. That's what we're talking about in this case, indirect blame and unintended consequences by actions done on a whim without any regard for the butterfly effect.
Some fool in iran shot down the plane and its on iran for not grounding flights during a time of high alert, so they clearly deserve a majority of the blame. but the US and Trump does deserve some portion of the blame