Atheists emotionally come to their views. You have to emotionally believe there is no design in the world, no Principle of life, no Creator that gives us rights, and the source and summit of love, happiness, reason, truth, and life.
I have some respect for agnostics, at least they say they cannot say what they believe about God, they simply admit they do not know.
No other group in the entire world, except atheists, that make a groups and adherence about a Person they do not believe that exists. There are no groups or delineations that form adherence about their anti-belief in the Tooth Fairy, Minotaurs, and Unicorns. There are no other blasphemies as a curse other than Jesus Christ. No one screams Mohammed, Hitler, Buddha, or any other major leader in fits of anger. You can only attack the living, and God and Jesus is real and is alive and the vehemence I've witnessed all my life towards God shows this.