Question

Why is the trail of Tears considered a shameful event in America history?

Answer 1

The trail of tears was considered shameful because it violated American ideals

Answer 2

I don't know what this has to do with the language German, but I'll answer it anyways.
The Trail of Tears was considered shameful because it violated American ideals, American laws, American Treaties, and was a violation of the humanity, rights, and dignity of the Cherokee Nation.