Someone tell El Greco and Goya they no longer count.
The expulsion of the Moriscos was a huge blow to Spain's human capital, but they weren't some grim theocracy devoted solely to God at the expense of science (which was very much helped out by the one and only Catholic Church, who helped patronize it).
And neither Britain or the Netherlands were secular; Britain was consumed by religious conflict (see: Civil War, English) and the Netherlands were a mix of Calvinist and Catholic. The difference they had was that they had developed an independent bourgeoisie in the major cities. The Dutch were largely urban, and London was as well.
Spain, on the other hand, had more bureaucratic monopolies on things, and had less of a bourgeoisie (except the New Christians and some native Christian petit bourgeois).
You want to know why Spain lagged, as opposed to the Proddies or France? Spain suffered inflation from New World gold, was constantly fighting in Italy, the Germanies, North Africa and the New World, and had to contend with a spate of fairly ineffective monarchs just as its competitors came into themselves.
And "breed people" in this context is so awkward...