I think this is a waste of post. Discussing topics like this is a waste of valuable time. There is no need for scholars to discuss matters like the proof of God when its clearly obvious for any man of intellect that God exists!
you are lucky that you havent had any kind of interaction with these athiests. If you had then you would have realised the importance and significance of this knowledge. for this purpose and other matter of fiqh etc muntiq (logic) is a subject taught during aalim course; as some islamic laws are formulated based on arguments.
hence; scholars through out the history have adopted different logics for da'wa.
Just to light up the day;
A young woman teacher with obvious liberal tendencies explains to her class of small children that she is an atheist. She asks her class if they're atheists too. Not really knowing what atheism is but wanting to be like their teacher, their hands explode into the air like fleshy fireworks. There is, however, one exception. A beautiful girl named Zainab has not gone along with the crowd. The teacher asks her why she has decided to be different. "Because I'm not an atheist."
Then, asks the teacher, "What are you?" "I'm a Muslim." The teacher is a little perturbed now, her face slightly red. She asks Zainab why she is a Muslim. "Well, I was brought up knowing and loving God. My mom is a Muslim, and my dad is a Muslim, so I am a Muslim."
The teacher is now angry. "That's no reason," she says loudly, "what if your mom was a moron,and your dad was a moron, - what would you be then?" She paused, and smiled. "Then," says Zainab, "I'd be an atheist."
Never be fanatical about anything, whether it is the truth or not, and your heart will remain in a state of soundness towards others. (Shaykh Ahmed Zarruq)