You're an atheist, I am a Christian.As long as a topic doesn't touch on the core principles of one of the groups, there is no reason for disagreement.
There can be women who are taller than some men and men who are weaker than some women, but there is a general tendency of men being a little bit taller and stronger than women.
The same goes for Christians and atheists. Both live on a spectrum and on average Christians are more authoritarian and conservative. And that goes back to Christian core principles. Christianity has one supreme authority, which makes Christians less opposed to authorities. Also, that authority is a "saviour", making Christians less proactive.
But, again, that are averages, not absolutes.
We can agree on so many things, especially politics.
We can agree that unbridled capitalism is wrong, we can agree that universal healthcare is a fundamental human right.
We can also agree on South Tyrol, that is, I believe that they are not giving these people the right to decide about their self-determination through a referendum. Like they did in Scotland.