Somalis and Islam

Hey guys I have a question to ask

Last Friday I went out with a couple of my Somali friends around 4 of us we were drinking and smoking weed enjoying life I guess we are in uni and non of them know I’m not Muslim even though they do all of that they still claim to be Muslim for some reason so basically after the high set in and we were drinking I brought up the fact Ramadan is soon and our Ramadan don’t count because of the 40 day rule they seemed unbothered so I asked them a question and this is exactly how I said it “be fr non of us even pray do you guys believe in Islam” please tell me why all of them said Astagfirullah while puffing the weed talking about ofc bro Allah forgives hes the most merciful like bro what I’m so confused