Yeah, there's nothing more offensive then a Christian calling another Christian "Brother" or "Sister". I see where you are coming from, I just don't like it very much.
Sorry if I offended you, but as a Methodist we don’t call each other “brother” or “sister”.
I do have friends that are Baptist and they use the term but only with other members of their church.
I haven’t heard him call any other candidate “brother” or “sister”.
Just an observation.