Why the relativists do they pretend that Isaac Newton disregarded their arguments while he had already answered all of them by demolishing the relative speeds of René Descartes in his De Gravitatione (1665-1666) at the age 23 ? (a question on Quora)

Why the relativists do they pretend that Isaac Newton disregarded their arguments while he had already answered all of them by demolishing the relative speeds of René Descartes in his De Gravitatione (1665-1666) at the age 23 ?
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How many times the nerves of Baptiste Fontaine and others admins of Quora could tolerate such a question ?