The connection is there indeed, despite your protests. Those who believe that evolution is a purely natural process are less than 12% of the population. That indicates one of two things: Either you guys have been less than persuasive despite the use of government schools, PBS and Time Life books, or there isn't any convincing evidence. Either way, it doesn't look good for the materialists.
And, speaking of materialists, that is the atheist connection, since a fundamental, though illogical, first principle of evolution is naturalism. Naturalism denies the existence of anything besides matter and its motion. Naturalism (also known as materialism) is necessarily atheistic and is the connecting point between evolution and unbelief.
It's your turn. Make the case for your point of view. Demonstrate to all of us that there is no connection between atheistic evolution and atheism.