Assuming Intentions

Suppose Pat, a Christian, believes that a certain group of people (Group X) should be able to do things that haven't previously been allowed, and that it's a matter of human rights for Group X. Suppose that such a belief by Pat would require interpreting the Bible in a different way from how it has been interpreted before, but Pat believes that this new interpretation is legitimate. Furthermore, Pat is passionate about giving Group X what Pat believes are human rights.

Meanwhile, suppose that Lee, also a Christian, does not believe that the new interpretation of the Bible is legitimate, and, although Lee is sorry not to be able to give members of Group X what they want, Lee cannot in conscience go against what Lee believes the Bible says. Lee believes that to do that would not only be wrong, but would also encourage the people in Group X to do things that are actually sin and thus harmful behavior, according to Lee's interpretation of the Bible. Therefore Lee believes that allowing these things would not be doing the people in Group X a kindness.

When Pat and Lee are discussing this issue with each other online, not knowing each other personally apart from the discussion, would it be legitimate for Pat to assume that Lee has malicious reasons or motivations for holding Lee's beliefs? Would it be legitimate for Pat to flatly deem Lee a bigot or prejudiced?

Similarly, would it be legitimate for Lee to assume that Pat has malicious reasons or motivations for holding Pat's beliefs? Would it be legitimate for Lee to flatly deem Pat is immoral or loose in Pat's beliefs?

I contend that none of the above assumptions is legitimate. Without evidence otherwise, both Pat and Lee should be assumed to have arrived at their beliefs sincerely and with good intentions.