Why do atheists deny the existence of the LORD?

All atheists deny the existence of the LORD.  All atheists deny the existence of God.  (They're two different things according to St. Paul -- and to Jesus.)

Every single atheist indulges in the unsupported fantasy that there is no God.  If this were not true, they would all be honest agnostics.

No he isn’t. So naaah !

Because the LORD is fictional and it isn't real.

Because it makes dumbshits like you ask stupid questions.

Of the Christians I've known in my life, maybe 2% I thought really 'got it'.  They were kind and tolerant and loving. Their lives were exemplary. Their homes were clean and neat.  Their kids were sweet and well-behaved.

Almost ALL Christians are self-righteous, sanctimonious, hypocritical HATERS.  Why would I join a belief system that's believed by such awful people?

Not for the same reason Christians accept the existence of the Lord but can't prove he exists.

The Lord is trickier than The Devil when it comes to existing . The devil convinces 

everyone she doesn't exist by not existing . One of the oldest tricks known to Shamans. Skydaddy pretends to exist by not existing . God copied the Devil . 

did u believe in father Christmas as a child? Shows what belief is doesn't it?

Thor scoffs at your baseless assertion.  :)

You mean Lord Buddha, don't you? We like him.