In Passage 3, when it states that “it was with the connivance of the Republican authorities,” this means...

they were conspiring with the Republican authorities
the Republican authorities disapproved of their behavior
they were fooling the Republican authorities
the Republican authorities were calling the shots

they were fooling the Republican authorities

The correct interpretation of the phrase "it was with the connivance of the Republican authorities" in Passage 3 is that they were conspiring with the Republican authorities.