Are jews white?
I will not communicate with you again. You are dead to me.
I don't associate with your type.
"White" is used as a synonym for "European American", which Jews are not. They are one of the various groups of Semites.
Are Tamil Indian people black?
Their skin is dark, often darker than many black Americans, but they are not considered "black" in the sense we commonly use the term in the USA, which is as a synonym for African American.
Here is an article from the Encyclopedia Britanica: Semite.
I was educated about this by a Jewish Israeli friend, who posted an article on her Facebook timeline on the topic.
Here is an article on this topic from newspaper "The Times of Israel": Ashkenazi Jews Are Indigenous To Israel, Not Europe
As the author points out this is of critical importance to Jews in Israel. If Jews are really just Europeans with a unique religion, then their claims to Israel are not very compelling. But, that is not the case.