"They use their weapons against us, so people are using what they have" — excrement.

"They have gas; we have excrement," say the ads for the "Shit March."

Protesters in Venezuela — where inflation is "in the high triple-digits" and people are starving — are collecting feces, from animals and from human beings, to throw at the police.

"The kids go out with just stones. That's their weapon. Now they have another weapon: excrement," said a 51-year-old dentist preparing containers of feces in her home for protesters to launch at authorities.

This isn't funny, but terribly sad. People are desperate and not thinking straight.

It seems that people, in their misery, are sinking to the level of monkeys and apes, who are often observed in zoos throwing feces. And yet here I see that "Researches find poop-throwing by chimps is a sign of intelligence." But if you read that closely, you'll see that the study is about the ability to throw, not the choice of projectile:

In this study, we examined whether differences in the ratio of white (WM) to grey matter (GM) were evident in the homologue to Broca's area as well as the motor-hand area of the precentral gyrus (termed the KNOB) in chimpanzees that reliably throw compared with those that do not....

Perhaps you — the human being or the ape — throw what is available. "People are using what they have," said the man quoted in the post title, and apes in zoos are using what they have.

When have human beings used shit as a weapon? Here's a Vice article on the subject. The ancient Scythians dipped their arrows in "a mixture of viper venom, viper corpses, human blood, and shit." In the Middle Ages, "the feces of bubonic plague victims was flung over castle walls with catapults in an effort to infect those inside." There was an "excrement trebuchet bomb" in 12th century China —  "gunpowder, human shit, and poison... lit with a hot poker" and launched. And prisoners in America these days throw shit mixed in milk cartons with fruit jelly (for stickiness) and hot sauce (for a burning sensation).

There is also a fascinating case described at that link of an Inuit elder who resisted Canada's forced removal of the Inuit to the high Arctic. With no tools and only 2 dogs, he molded his excrement into a knife shape, which froze into a workable knife — "the shit knife." But he didn't stab anyone with the knife. He butchered a dog, and he used the meat to feed himself and the other dog. And he cut the pelt to make a coat and the guts to make reins for a sled fashioned out of the dog's ribcage, and he escaped.