There are really three kinds of Laker fans:
1) People who live in LA...
2) People who grew up loving Showtime (which WAS America's darling) and fell in love with the Lakers then (this includes an enormous fan base across America and abroad, the global reach of the NBA was just starting and people in Europe and Asia got to adore the Lakers because of Magic, etc. - I am included in this group)
3) Bandwaggon losers who got hooked on to the Kobe-Shaq dynasty because they had to find someone to root for after MJ retired... Now they are dusting off their purple and gold because the Lakers are back in it.
People that you see in the stands of most basketball arenas wearing purple and gold jerseys obviously fall in the latter two categories, but are most probably just bandwagoners. Maybe a few of them moved to Boston (or wherever they are on the road) from LA, and maybe they are still THAT committed to the franchise of the 80s (like me), but they are probably just bandwagoners. As a Laker fan, I give you permission (once you are sure they are from the third category) to pester them.
Ok, now... other than these three groups... NOBODY WANTS THE LAKERS TO WIN. Sure, there are some talking heads out there who want the Lakers to win (dudes like Buecher), but majority of people in the US hate Kobe and hate the Lakers (especially now that they have that "Euro" stench on them). The Celtics have 3 genuinely cool cats that you can root for to win their first titles and who appear in all those silly ESPN adds... Man, even I genuinely WANT the Celtics to win A (if not "the") Championship... I have to root against you guys because the Lakers are playing, but there is just no animosity (unlike against the Jazz and the Spurs... URGH I hate the Spurs team/coaches and the Jazz fans... SOOOO MUCH!!!)...
So there... the short answer is that the country DEFINITELY wants the Celtics to win.
Except people in LA...
And people who started following basketball in the 80s...
And those annoying bandwagoners that I in the name of all LA fans declare free game for beer showers.