This is a
somewhat lighthearted attempt to try and find common ground around the fringes of beliefs of both -
Turn on the captions if you cannot understand his accent
Fair warning - he does not answer the question in a straightforward way - but that is typical of the way he interacts - his goal as stated is to encourage self realization rather than provide answers - belief versus knowledge
The Hindu astika schools of thought span duality and monotheism all the way to atheism - and really allow for personal customization of belief. I think some of what this gentleman is referring to, comes form
Samkhya
Any and all thoughts welcomed
I am not sure if I have a positive answer for this, though I want one. On a theological basis, I do not see atheists and theists having any chance for common ground, since atheists have no theology. But this is not the only place that people interact.
I will tell you that the most difficult group I have trouble with is a mixed group of people that I call fundamentalists. They could equally be referred to as extremists. There may be a better term to describe them, but I could not come up with one at this time.
What I see common in this group is reliance on dogma, assertions without evidence, closed-minded adherence to belief, often arrogance, reliance on emotion rather than rational thought, and, also quite often, reliance on logical fallacies instead of sound reasoning and evidence. In my experience, you can find members of this group anywhere and sometimes entire groups are made up of people with that mindset. Fruitful discussion is difficult to find among members of that set. Often it is impossible to find.
In my experience, there are atheists that fit the description above, but I often find that there are many more among atheists that do not and productive, intelligent and even fun conversations can arise with them on a variety of subjects. The common ground is logic, reason and evidence without the interjection of assertions based purely on belief.