He made more demands
He saw that the European community was afraid of a war and was prepared to give him anything he wanted because of their appeasement policies. This is why he started making even more demands after and when no more things could be given, world war two broke out with a German invasion of Poland and the rest is history.
Southerners wanted Native American land to expand and benefit from the production of the profitable farm and plantation land.
So, they got the Federal government to evict the Native Americans.
No, I would have not dropped the atomic bomb over Japan. The reason I state this is because I would have considered the many people that would have died in the act. Entire families would have been vanished or broken apart, many years would have been shed. A lot of hearts would have never been mended through the course of time, a horrid memory would have stayed with them till their very death. Also, many innocent people would pay for the act of a few bad men.
Not many good things came of it.