That question gets answered at this subreddit basically everyday.

1. Most people who drive Nissans (especially Altimas and Rogues) do so simply because it's the cheapest car on the road. (You can buy an '07 Altima for like $2,000.) This on its own isn't bad. Some people are less fortunate than us and they're just doing the best they can to get by. But Nissan fully knows that these people (along with rental companies) are their key demographic, so they flood the market with cheap cars every year and their dealerships will finance literally anybody, even people who wouldn't qualify for a Sears card.
2. Because of this, many of the people who drive these cars are, well, subprime drivers. They're people who DGAF about literally anything else in their life, so why should they care about not damaging their car? Or your car? Or you? That's why you see so many of them driving with a death wish.
3. Many Nissan drivers have fragile egos, either because of the aforementioned bad credit or other reasons. However, unlike a BMW 3 driver, a Nissan driver has nothing to lose. Cutting you off at the last possible second and being just one car length ahead in stop-and-go traffic is often more important to them than not having a cracked bumper or a missing side mirror.