Atheists also have faith, just a different kind.?

Have you ever thought it peculiar how some Atheists put down Christians about their faith in God when Atheists also have faith that God doesn't exist. Christians can't definitively 100% prove that God exists and atheists can't 100% prove that God doesn't exist. Please I'm not trying to start some big argument, I just wanted to put out a simple fact. I just think when some atheists(not all of them) will put down Christians when they too have faith, I just see this as hypocritical.