I think they would probably act like this if they found out who Naruto's Parents were-
Sasuke: Knew it all along. What idiot could not see that Naruto looks, acts, wishes to be, and has the speed of the Forth Hokage.
Karin: You Mean, by marriage, I am related to the Forth Hokage!?!?!?!
Sakura: But it can't be possible! Naruto is so stupid! And the Forth was the best in his class. *eye twitch* Does that make Kakashi-sensei Naruto's Brother, Because Kakashi was the Forth's Student, and Naruto is the Forth's Son???? *Eye twitch*
Ino: Dude, If you haven't noticed, Naruto, Minato, Me, and My father are the only Blonds in the Show, and Me and My father are not related to Naruto at all, so you guys are just idiots!!!
Hinata: Well, I stock him, so I already knew! HAHAHAHAHA! You can't fool these eyes! MWAHAHAHAHAHA!!! They look exactly alike, and you wouldn't even think about it unless you are watching Naruto from behind a tree 24/7
Naruto: You DO WHAT NOW?!?!?!?!
Hinata: Oh nothing, nothing...*Faint*
And finally, Nagato: No wonder I was beaten.... But wait. Karin isn't the only one here who is an Uzumaki, I am too!!! Hahahahaha!!! I am also related to the Forth Hokage!!! And that means I basically am following orders from someone who is trying to make me kill so many members of my family, and all are literally members of my family! Kushina, Minato, Naruto... Well I guess there isn't that many, BUT STILL!!!