Raid without village and bad omen

I have a base with two nitwit villagers in it. I have made sure that there are no beds (I don't want my base to be a village), but for some reason, while I was in my base a raid started. I had killed a patrol captain beforehand but then had drunk milk to remove the effect. I don't understand why the bad omen effect disappeared after I drunk the milk but still triggered a raid and I don't understand why my base is considered a village.