CAA protests: What is urban Naxal force and why are they trying to infiltrate Indian Army?

Various reports by the Intelligence Bureau and the investigations by Delhi Police suggest that there are several Naxal sympathisers who have been fuelling protests over the amended Citizenship Law along with the Opposition. This makes it clear that the Naxalites through protests such as these or even at the one at Bhima-Koregaon are pushing hard their urban strategy which also includes infiltrating the Indian Army