I note three things from that history of atheism:
1. Many of the people cited (Galileo, for instance) were not atheists at all, but devout Catholics whose religious views have been turned on their heads by Protestant mythology about them.
2. Most of them are heroes to Protestants, even if, like Galileo, for purely fictional reasons. So if you’re arguing that atheism and Protestants are somehow enemies, you picked a lousy link.
3. The site is a very counter-Christian, claiming for instance, the first amendment as a watershed for atheism, when, in fact, it was intended as protection for Christian diversity.