Hello Golu Kumar!

You have not specified the context of the question. So it would be difficult to answer this without knowing about the background of the question. However, it seems to be a question based on the Martin Luther's famous speech that speaks about racial discrimination.

Keeping this as context, they thank almighty when finally the racial discrimination is completely eradicated. When black and white, protestants and catholics, Jews and Gentiles -  be it anyone, is not judged and analyzed based on race and caste, but rather only on its character. They thank God when this happens, because this is called the true freedom, when lives that are different from each other live together with and peace.

Hope this helped!