"There are two types of people in the world..."
The internet is littered with memes set around this topic.
A lot of them invoke a normal expectation for one group and more extreme reaction by the second group.
There are some that are inspirational in nature.
- Democrats and Republicans
- DC fans and Marvel fans
- Cake bakers and pie aficionados
- Christians and people who are not Christians. Or you can replace "Christians" with "Muslims", "Jews" or any other religious affiliation and get the same results.
- Tastes great and less filling
- Cat people and dog people