"he believes that it is efficacious for the salvation of the large proportion of the human race" ... is not equivalent to saying that the large proportion of the human race are or will be Calvinist.
Of course Calvinists and Hindus are both fatalists so I guess you can count all of the Indians in the Calvinist column ... sorta.
You were making the point that Calvinists did not believe a great many people are saved by Christ's sacrifice ("Isn't it a basic corollary of Calvinism that there aren't going to be that many Calvinists? The way is narrow, etc") and I showed you where you were wrong since Calvinists believe all who believe in Jesus Christ will be saved which, thankfully, is a great number if not, one day, the majority of men and women.)
I would expect all Christians to know the difference between fatalism and God's ordination of all things.
WHAT IS FATALISM
by Benjamin B. Warfield
This is a sad state of mind that people fall into sometimes, in which they do not know the difference between God and Fate...