Residents expressed dissatisfaction with the Israel Police's "culture of covering up" and said they had faced similar acts of harassment and assault for years.
The camels were found in a state of decomposition with no shell casings at the site, indicating that they were not killed by gun fire.
The threats referred to renewed IDF operations in Gaza and the issue of bringing back the remaining hostages.
Democrats party chairman Yair Golan joined the protesters on their march.
The IDF announced that the Israel Air Force intercepted one projectile, and confirmed that two others hit an open area.
Shin Bet and Israel Police reported that the investigation has ended, and an indictment will be filed against the Kafr Kanna resident later on Thursday.
Israeli police have discovered another monkey in a Bedouin village, part of a larger wildlife smuggling operation that used drones from Egypt and Jordan to transport animals, weapons, and drugs.
Since the beginning of the month, numerous incidences of lions and monkeys being discovered throughout the country have been reported.
The INPA stressed the dangers of the illegal wildlife trade, stating that smuggled monkeys may carry diseases such as tuberculosis and rabies even if they do not show symptoms.
According to official figures, eight monkeys and three lion cubs have been recovered so far in operations carried out in collaboration with the INPA.