One of the most striking stories my grandmother always told about WWII (she was born in '34) was how, when she walked to school, very often US fighters shot at the children walking there. There was no way this was a mistake – they were still children, the road only led to the school, no one else was walking there at the time. And still, every few days fighters shot at them, and they had to jump in a drainage canal, or similar to hide.
Seeing your friends from school being shot by fighters in front of your eyes can hurt a child a lot.
Many old people here still hold a grudge towards the allies, despite all the amazing things they did after the war to rebuild.
But if attacking civilians is the measure, then the US is a terrorist state. And has been for decades.
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There is a side that gasses jews, and a side that nukes civilians. There is a side that bombs hospitals, and a side that blows themselves up at a concert in Paris. There’s a side that massacres disabled people, and a side that shoots children.
We can’t compare, or even weigh up the sides against each other, and doing so would miss the point. But we can’t say "only terrorists kill civilians".