The numbers are speculation, but the basic facts aren’t.
The whole region of what is now Afghanistan and Pakistan were once Buddhist and Hindu. Whether the old population was replaced (wiped out and recolonized) or just converted, or some mix of the two, is pretty difficult to say. Lots of cities were taken, ruling classes replaced, temples demolished, etc., all over what is now India, mainly in the North, but in many cases there were Muslim rulers even in the far south.
This all happened in a series of invasion waves over a thousand years, it was not just Tamerlane and his successors (what would become the Mogul dynasty). Indeed, Tamerlane’s original attack on India was directed against the lands of the Muslim Sultan of Delhi, and the famous tower of skulls was probably made up at least partly of Muslims. Thats not to say that Tamerlane did not engage in open genocide of all unbelievers he met on the way, because he did. The Moguls’ own account of it makes for chilling reading.
It’s called the Hindu Kush for a reason bro. They murdered untold millions
Thus the destruction of the Twin Buddha’s during the Iraq War period under US Occupation.... Humm?
Muslim imperialism, Muslim ethnic cleansing, Muslim genocide. These are realities, past and present, that go unmentioned by our systems of mass indoctrination (T.V., movies, mainstream news, documentaries, academia, the pulpit).
As mentioned before, communism and Islam fuse their ideologies with the power of the state.
Neither Islam, nor communism contain significant elements of self-restraint. For example, there is no commandment against murder in atheist communism. I gather that Islam contains the New and Old Testament in some form, but they are much less important that the words and actions of Mohammed. Mohammed beheaded more than 300 Jews, etc.
Both Islam and communism devalue Truth, each in their own way. Islam teaches that it is all right to lie to infidels. Marxism teaches that advancing the cause represents a higher morality than telling the truth. Marxism also teaches that there are multiple truths, and that truth is relative.
The New Testament contains a lot of emphasis on Truth. I assume the same applies to the Old Testament. Christ said, give onto Caesar that which is Caesar’s; and give unto God that which is God’s. This constraint is always there in Christianity, even if it has not always been binding on secular and religious powers.
V. S Naupul in his book - Beyond Belief: Islamic Excursions Among the Converted Peoples pretty much says that.