As a guy who grew up in a culture similar to India and having a thing for dating basic white girls who don’t venture outside their home towns much… Kimberly was pretty much like all of them. She’s not acting, she’s kind of a stereotype of this type of girl. Hard to explain, but you know when you know.
Kyle is easily the best American fiance in the history of the show. He was the first one to actually show empathy and compassion for a fiance who left everything behind to be with them. The dude crafted their wedding to be more in line with her culture than his. And he literally left his state so she could be in an environment that was more friendly to Asians. No one else on the show would go to those lengths.
The anger is just who she is. Who you like a basketball that was square shaped?
If she’s visiting him, that implies they’re amidst filming for another season. There’s literally no other reason for her to fly out to Nigeria to see her husband.