The indians are genetically incapable of being good or outstanding sportsman.
Here i think it should be only indians. If i want to use the then use as the indian not the indians.
Am i right? If 'no' then give the correct explanation.
In a sentence like the example "The Indians" means "Indians as a group, and is perfectly grammatical. "The Indian" means a single, specific Indian. Saying "Indians are incapable" has much the same meaning as "The Indians are incapable" but does not emphasize the group as much.
Many people now consider such statements which assign properties, particularly negative properties, to entire groups, to be impolite or even racist. But such statements have been common in English through much of its history, and some still make them.