I am a remote worker on a mostly office-bound team. I am not particularly experienced (about 3 years out of college, all with this same company), but our team is mostly people around my age, with one more senior dev (we will call him Dave) and a manager.
Dave is an alright developer, and in person he is generally agreeable, but over email, on code reviews, over chat, etc. (basically any form of communication that requires reading and writing) his tone is frequently disrespectful. When someone disagrees with him, he will often accuse them of not understanding the situation, when he gets frustrated he will simply state his opinion on what should be done and say the entire conversation was a waste of time, and generally his tone is either commanding ("do X" rather than "I think we should do X") or dismissive and bordering on disrespectful ("do X so we can move on from this ridiculousness"). I also frequently find that I will put together a long, well thought-out and respectful disagreement with one of his ideas, his response often makes it seem as if he didn't even read what I wrote. I wonder if maybe he is just exceptionally bad at written communication and doesn't realize the tone he is conveying to everyone else.
I'm not a particularly thin-skinned person so on a personal level I don't care too much about this, but it is incredible to me that nobody else seems bothered by the way he treats his coworkers. With our team looking to be more remote-focused to deal with Covid-19 I am concerned that this is going to be the way all of our interactions will go, which will be not just unpleasant but will also shut down important conversations before they get to a good endpoint.
What is the best way to deal with this? I worry that I may not have the office-political capital to bring this up to him directly in a way that will have any impact, but I also don't want to be seen as a snitch or overly sensitive by bringing it up to my manager. It is also hard because most of his behavior is just borderline enough to not be outright disrespectful, though I really think he makes it clear from his tone what his level of respect for his colleagues is.