The idea is that an Atheist believes there is no God, the same way a Christian believes in Jesus as the Son of God, etc. As far as I'm concerned, if somebody wants to believe in the flying spaghetti monster, they're welcome to do so. Obviously, if they wish to convince me, they need some evidence &/ or reason that I can agree with, first.
Where I disagree with that ^^^ comparison of atheism is that where believing in Yahweh/Jesus
requires belief that an invisible friend
1. made the earth and populated it with life in the span 6 days
2. drowned all life on earth except the one pair of
each land species that were fitted on an ark and floated around for 40 days
3. opened the Red Sea long enough to allow the Israelites to run across it and promptly drowned the pursuing Egyptian army after the Israelites were safe
4. had prophets living for up to 1069 years
5. caused a virgin to give birth to his son who was then
6. killed, buried in cave and resurrected
whereas atheism simply requires lack of belief in such whopping claims by various religions because of lack of supporting evidence.