Trump is a malignant narcissist with a hyper-manic temperament and dementia. As such, he doesn't do things for other people, he does things for himself that may possibly benefit other people.
He also tends to fuck up everything he tries to do in some important way and then bullshit his way through it, which really keeps the n-th dimensional chess conspiracy theorists on their toes trying to explain his antics.
30,000 people being killed is not why Trump started this war, it was his excuse to try to put some money in his pockets and to grow his brand.
My crystal ball, informed by his past performance, predicts that Trump will make some money from the situation, and the inflation and humanitarian crisis will increase the overall level of human suffering far in excess of the status quo.
That seems like a reasonable thing to be mad at.