Hello opinions are a bit split whether someone minds being called bro or dude if used in the casual slang sense. You can give that as your reason but like just not do it afterwards to them, and maybe stick to only using it with people you know personally in the first place. A trans friend of mine decided a ways back that 'bro' is misgendering and 'bruh' is gender neutral, I'm in punk rock circles where 80s slang is still in circulation and 'dude' is so ubiquitous its list all meaning, but at the same time if someone doesn't like it, we don't call them that, it's just being a decent person.