Beyond that, I dunno what the meme is supposed to be suggesting.

double entendre on the word "front." The front (as in frontal view) versus a "front" in the political sense of the word. I feel an urge to say "It's not your fault; it's not very funny." But maybe it's hilarious and I'm just missing it.

Hamas, the PLO, Hezbollah etc...

The idea in the movie was that there was The People’s Front of Judea and the Judean People’s Front. Both were groups that opposed the Roman occupation of Judea but they were more focused on attacking each other rather than fighting for their common cause.

In the real world back in the 60s and 70s there was the Popular Front for the Liberation of Palestine from which splintered the Palestinian Popular Struggle Front and the Democratic Front for the Liberation of Palestine.

Not knowing the context the meme was presented in I would venture to say it probably pointing out infighting like this in modern political groups - and the purity concerns / focus on small differences / inability to work together.

It's from a scene from Monty Python's The Life Of Brian, and it's depicting an internecine squabble about which, of many groups (in this context, Jewish people against their Roman rulers) is the real/pre-eminent group of 'revolutionaries', and the joke is that nobody really knows who's part of which group, they change their names frequently, fight amongst each other so nothing productive actually gets done. You kinda have to have seen the movie for it to have meaning, and would only have value as a meme in a very specific context/discussion.

... indicating some meaning only known to themselves. The context was one person's changing the verbiage of what another person submitted for a list. The list was not a list of groups or factions. See? Doesn't help, does it?