Do you consider Dr. A. Deshmukh any credible source for the knowledge of Hinduism? How would you counter her?

No, I do not consider Dr. A. Deshmukh to be at all a credible source for knowledge of Hinduism. They (I am not convinced they are actually a woman; many report that he is a Christian man named Alfred) are consumed with vicious hatred of Hinduism and are fanatically dedicated to attacking it by any means necessary, including significant distortions and falsehoods. Anything they ever say about Hinduism is calculated for the purpose of attacking it, with conscious and deliberate malice.

I see little point in trying to counter such a person. I’ve posted comments refuting some of their answers before, but they are dedicated to their mission of attacking Hinduism and have zero interest in any conversation except to that end. Such an utterly hate-consumed person should simply be ignored as a ranting troll while normal people get on with serious conversations.