DanielPipes.org claims Will Durant said:
"The Islamic conquest of India is probably the bloodiest story in history. It is a discouraging tale, for its evident moral is that civilization is a precious good, whose delicate complex of order and freedom, culture and peace, can at any moment be overthrown by barbarians invading from without or multiplying within."
The same claim was quoted in this Hinduism.SE answer. It says:
Will Durant, the famous historian summed it up like this:
"The Islamic conquest of India is probably the bloodiest story in history. It is a discouraging tale, for its evident moral is that civilization is a precious good, whose delicate complex of order and freedom, culture and peace, can at any moment be overthrown by barbarians invading from without or multiplying within."
Did he say this? And did he call the conquests "Islamic"?