I was watching this deleted scene he other day, and I noticed a few things:

1. He barely fights back
2. How did everybody know?
3. Why did Vito hide himself?
4. Why was Don Fanucci never guarded?

I'm not really sure about the 3rd, but I think he diden't say anything to Genco because he wanted to take care of Don Fanucci himself.

Genco said: "Nobody can stop Fanucci." But it were just little kids who cut his throat.

Hope it doesen't sound too stupid.