@OP, I am sorry but you did wrong too. We can't say anything sure for the guy, in the blue car, may be he actually is in real emergency, couldn't he? Though still he shouldn't have foul-mouthed in any case. But, you, in any case, should not apply brakes in such scenario, unless, you have to due to the traffic ahead.
What I do in such situations (idk if it's technically correct) when someone asks for overtake, I give a left indicator and the guy behind gets to know that I am about to give him the way. This works in most cases, though, guys having diarrhea sped away from left I prefer closed windows so that, besides the other advantages, I don't get to hear whatever they yelling
Though, being Karachiite, and after being in an incident lately, I don't give leeway to any approaching CG125. Indeed, I then push more to the right
And I would request the fanboys to please not to turn it in Toyota vs Honda battle. You can't generalize this idiosyncrasy to any particular brand owner, being they PWs or not.
PS: Just FYI, I don't own a Toyota, never did