The image depicts two figures set against a fantastical backdrop. On the left side of the image stands a person who is dressed in a white robe that is commonly associated with depictions of Jesus Christ in Western art. This figure is making a nonchalant gesture with their right hand, palms up, as if expressing uncertainty. On the right, there is a man wearing a suit with one hand raised in a similar fashion to the other figure, and he is wearing a black leather glove. The backdrop features a cloudy sky that gives a sense of being up above the world, perhaps a heavenly or otherworldly realm, with a classical arch structure that might symbolize a portal or a gateway.
The figures are accompanied by a speech bubble, which contains text attributed to the man on the right saying, "I dunno bro, looks like a fit to me." This informal, contemporary language creates a humorous contrast with the solemn and traditionally respectful depiction expected in a scene featuring a figure that resembles Jesus. The use of the word "bro" is specially incongruous with the serious imagery usually associated with religious iconography.
The comical aspect is further enhanced by the juxtaposition of the two differing personas: one that is supposed to represent a divine, sacred figure and the other a modern everyday man dressed in a business suit. The banter indicated by the speech bubble implies a light-hearted and friendly interaction between the two, which is amusing given the lofty, otherworldly setting that contrasts with the casual discourse.
Why this might be funny to people has to do with the subversion of expectations. The representation of a divine figure engaged in what appears to be a mundane conversation about clothing fit is unexpected and satirical. It pokes fun at the concept of divine authority by placing it in an ordinary, relatable context.
The image also plays with the concept of anachronism, which occurs when something is placed in a time period to which it does not belong. The modern speech and attire of the suited man are humorously out of place in what might be interpreted as a historical or religious scene, contributing to the comedic effect.
Finally, the notion that a divine figure would be concerned about earthly matters pertaining to fashion is inherently funny because it inverts the usual roles ascribed to such entities. It suggests a level of petty human concerns being applied to a figure normally considered to be above such things, provoking laughter through the absurdity of the situation. I dunno bro looks like a fit to me