Why is this interesting? I suppose geopolitically it’s a form of shit-testing. They are probing the limits. Any escalation to this inevitably will lead to war

Why is this interesting? I suppose geopolitically it’s a form of shit-testing. They are probing the limits. Any escalation to this inevitably will lead to war (if someone misjudges and goes after a US diplomat, or official). And I wonder if the west is close to a misstep. Right now the US is killing Iranian generals and scientists with impunity. All these things have limits.