I sound weird saying it too. I totally understand.
I know I didn't articulate it that well but I'm shocked that these dudes are shocked that saying nikka doesn't come naturally to some folks.
I figured we all know other black folks that if they were to say nikka on a regular basis even other black people "nah it doesn't even sound right coming from you" not in an offensive way just like they're faking. Not saying it makes me a better person or anything I'm just honest about my image.
Also like I said I've never used the word because my family outside of an uncle never used the word like that either. Just not part of my world even when I listened to hip hop most of my life.