The phrase "opposite camp" refers to a group of people or a different side that has contrasting opinions or beliefs compared to another group. Full definition
Linda and I frequently find ourselves in opposite camps on the vaccination issue, but this season's virus is throwing a wrench in the works that no one (including the CDC and AAP) knows what to do with. (babybunching.com)
My husband and I were from opposite camps... I was not totally AP (I really did like a lot of the practices you had described in your previous articles) but leaning towards that while my husband is very much CIO. (drbenkim.com)
There are differences in matters of belief and practice between Marxism and Christianity and they drive them into opposite camps. (religion-online.org)