Who is generally more tolerant: religious believers or secular atheists?

I consider myself tolerant up to certain point. If someone blatantly insults me for not reading their bible or starts venting that I'm going to go to hell for not asking a deity for forgiveness, I'm going to fire back too.

This will never go anywhere but who would you say is more tolerant; a believer/religious person or a non-believer? In my experience, I think we secular, non-believers are more tolerant towards believers than vice-versa.

Religious believers are more tolerant
Secular atheists are more tolerant
Other
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Who is generally more tolerant: religious believers or secular atheists?
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