The moderate sunni muslim would be the one who wouldn't crucify Christians like ISIS did in iraq & syria.
Who would be believe in secwere notvalues of coexistence.
And I am Ex.sunni muslim.
Left islam.
I am agnostic atheist, who believes there might be some spiritual and supernatural world.
I am open to everything.
The vast majority of what you probably mean by moderate sunnis is found in Assad held territories and northern part of Syria which is controlled by marxist secular YPG. In the former rebel controlled Eastern Aleppo there were no moderate rebels, the most powerful group was Zinki who just 4 months ago beheaded a 11 years old Palestinian and till 6 months ago it was funded with money and weapons by your government.