The image is a tweet. A user named "çççç duygu" (@nemasumuya) posted a statement expressing surprise that the idea of Ebu Cehil being angry didn't come to their mind sooner. The joke plays on the stereotype of Ebu Cehil, a prominent figure in early Islam known for his opposition to the Prophet Muhammad and often depicted as extremely hostile and angry. The tweeter implies that the idea of Ebu Cehil being angry shouldn't be difficult to understand or even is so obvious that it shouldn't have required much thought to imagine. The humor comes from the implied contrast between the expected reaction of Ebu Cehil (someone expected to be angry) and the tweeter's surprise at not having thought of that reaction beforehand. It's a lighthearted, somewhat sarcastic way of saying that something was obvious.