The only positive value that can be ascribed to the modern atheist movement might be to liberate people who are caught up in, and subjected to, brutalizing and oppressive religious dogma. That’s a valid consideration.
That might have been the idea of Christopher Hitchens book ‘God is Not Great’. However, the blunt instrument, used extensively by The New Atheists, of mocking superiority and general rudeness towards people of faith, means that whatever good might have been achieved usually gets lost.