Please tell me what I have to say

Hello The reason I'm writing this is because I had to write something at school today with a marker, and my partner ㅇㅇㄱ and the person behind me were ㅈㅇㅅ, and they wrote "BTS's 'All Manghae-ra'" and when I asked why they wrote "All Manghae-ra", they wrote the lyrics of 10cm's "I like the spring of water" and that asshole called ㄱㅇㅁ started swearing at BTS. So when I asked why BTS oppas were swearing, they said "All Manghae-ra" wasn't a swear word and asked if I was delusional when I said it and