I always wonder why can't one choose to be nice to people without using divisive language, emotionally charged accusatory jargon (like "imperialist"), devaluing

I always wonder why can't one choose to be nice to people without using divisive language, emotionally charged accusatory jargon (like "imperialist"), devaluing somebody's sincere contributions and framing the situation in group vs. group terms? Like, if the point is that you choose to be nice to people, why can't you start with being, you know, nice to people? For example, if the same sentence was formulated as something like "expanding the contributor community by including people knowledgeable and proficient in languages not commonly spoken in the West and soliciting feedback from such contributors would greatly expand the appeal of the resulting solution and make it more widely applicable" - wouldn't that sound more nice to people?