Those guys are either gonna dust you or use you as bait.

As an archangel, Gabriel is naturally inclined towards dominance without even realizing he is- it’s the one thing about his status he’s never lost. When he walks into a room, he knows he's the most powerful creature in it and people will take heed of that. Take the scene in Hammer of the Gods where he crashes the god meeting, for example- to them, he's a minor deity, but he walks in and talks to everyone in the room like his is the biggest dick there and alpha males his way through the entire conversation. He doesn't need to show off or abuse his powers to prove to people what he can do, because he expects people to already know. When he brings down the pain on someone, that person will have deserved it in some way, either because they were a target or because they needed to be shown that he won't be toyed with. Gabriel doesn't expect to be taken seriously or even respected, but he does expect to be considered the dominant force in the room- the alpha, essentially- because the only thing higher than him are his two older brothers. He doesn't often flaunt his abilities, aside from providing himself with creature comforts- he merely does what's necessary to keep up his appearances as a Trickster and nothing more, although one could argue that his showmanship and his grandiose way of taking victims is flaunting. Gabriel just thinks it's a necessary part of his enjoyment of his job.

Respect isn't something that comes naturally to Gabriel, despite how much he seems to love. His flippant attitude towards Lucifer all but proves this, even though it's clear Lucifer is one of his favorite brothers. It's almost impossible to earn what he terms as "respect" (as in, someone he won't mock, talk down to, or generally torment). He treats everyone as equals and even if he's afraid of someone (again Lucifer), they get just as much of his snark and attitude as anyone else- he doesn't discriminate and he doesn't treat anyone differently just because they're a "special snowflake" who dareth not be offended- he even treats his friends with the same amount of smarm he uses on everyone else. His aggressively dominant, arrogant attitude generally means that he doesn't find it easy to show people respect anyway. Conversely, however, he also doesn't expect to be respected in turn- he expects people not to think their dick is bigger than his or presume things about him, but he doesn't give a damn about respect. It's atypical of an archangel, but most everything Gabriel does is. Note that it's only after Dean implies that he's "someone's bitch" that Gabriel officially snaps and attacks him. He had been coiled and ready to strike right before that, but that was the moment when he snapped- his authority and status had been challenged, as well as his relationship with his family and it broke something in him and destroyed his carefully cultivated nonchalant veneer, forcing him to take action- it wasn’t about the respect, it was about a mere human having the gall to think anything about him, an archangel. Presumptions upset him, especially coming from people who don't understand anything about him or his actions and why he takes them.