Why didn't you think so? I think it's normal for Barcelona to win at Camp Nou, especially since this match isn't a domestic match which has lower prestige than the UCL. This is the Barcelona I know, not Barcelona who could only win with 1 goal like in their previous match when they met Mallorca or could only get a draw with 0 goals when they met Athletic Bilbao.
Barcelona did what they had to do yesterday, in fact Napoli are not as strong now as they were before, and the odds 1.75 for Barcelona to win were a little confusing. I will even say that Napoli was a little lucky that with just one shot at the goal, they were able to score a goal, and play a draw, thereby avoiding a loss in the home match. But after the first match it was clear that the return match would be much more difficult for them.
The performance of Napoli yesterday against Barcelona was very poor if you ask me and that was not what I expected from a top team like Napoli. After the 1:1 draw at the Diego Armando Maradona stadium in the first leg of this particular tie, I was of the opinion that Barcelona will beat Napoli in the second half but I didn't expect the win to be as easy as it was yesterday night at Camp Nou.
Barcelona were simply the better team through out the whole 90 minutes even when they were facing the reigning champions of Italy. That being said, I think Xavi Hernandez deserves more praises than he's getting at the moment for what he's been able to achieve with the current Barcelona team because considering the injury crises that's hit the club since the start if the season and the fact that they've been suffering serious financial issues that's made them not to sign top quality players in the last three transfer windows, I never expected Barcelona to reach the quarter finals of the UEFA Champions League competition. The young Spanish manager have already said that he's going to leave the club at the end of the season even if they end up winning the UEFA Champions League trophy this season