Mocking leftists online these days is a mixed bag: They provide endless material, but they also control social media and can swiftly shut you down.

Such is the fate of “MadeByJimBob,” a series of simply drawn, rightward-leaning memes that first appeared on Instagram and Facebook in 2016. Originally just pop culture gags, the posts soon took a political turn as JimBob, the cartoons’ mononymous creator, began to reconsider the routine liberalism of his entertainment-industry circles in Los Angeles. In a matter of weeks, JimBob attracted thousands of followers for his deft slap-downs of left-wing orthodoxies and double standards, and discovered just as quickly how apt the host sites were to delete his work.