Carefully read the saga again

finished? good.

It took 4 lvl 2 sound ninja , to take care of 2 jounins. And they needed to rest afterwards.

Kakashi is just about the strongest jounin introduced from konoha.
plus he knows them , and their techniques etc.

one lvl 2 sasuke won't do shit against kakashi.
Naruto won't attack kakashi.( you could say he's berserk and stuff, but so was he at haku, and there he stopped the second he saw his face. )