I don't know what that means, in this context.
Its usage was an implicit: "I do not know you and have not been tracking your posts very well to-date but I'm sure that such a claim is easy enough to substantiate through online research, and I really don't feel like digging into that new sidebar just now, so, reasonably confident - based upon what I've seen of your online personality manifestation to date - that you would not voice such a claim that could so easily be set aside with quick research if it were not true, I'll give you the benefit of a doubt until such time (if ever) as you are ever caught egregiously bullshitting, and I will at present accept what you say as a likely truism, in the narrow and modest context of the present exchange - subject to a right to change my mind later, if I subsequently learn otherwise."
The phrase: "I have no reason to doubt you on that score." seemed a little more succinct.
And, do I more frequently extend the 'benefit of a doubt' to those whose views more closely align with my own, than I do to those whose views run contrary to my own?
Yep. I do it all the time. Both consciously and unconsciously.
We all do, to some extent or another.
It's just that some of us have more trouble admitting it than others.
It's just that some of us allow that to functionally impede us more often than others.
It's part-and-parcel of the human condition.
So long as we're honest about it, and compensate as best we can when it threatens to impair judgment or functionality in some important matter, it's well within the range of normal thought and behaviors.
Nothing to be ashamed of.
Just watched with a careful eye.