Iguodala had scored just 26 points altogether, with three three-pointers, in the Warriors' first three games.
He was not a highly regarded three-point shooter before the Sixers traded him to the Denver Nuggets in August 2012. Iguodala opted out of his deal last summer and signed with the Warriors (3-1) as a free agent.
"One year I was here, I was top 25 in the league in three-point percentage," he said. "But it can be tough on you sometimes as far as the focus is always on what can't you do. Not what you can do."
Iguodala said that he never tries to prove anyone wrong.
"I just try to stay true to myself," he said. "And this was kind of an example that I stayed true to myself."
Iguodala said he understands that he was known as an all-around, athletic wing. But against his former team, he showed that he's capable of making open three-pointers.
"I can shoot the ball," he said. "It does feel good, but I wasn't trying to prove anything" to Sixers fans.
The Sixers were focused on denying guards Stephen Curry and Klay Thompson from making threes - not Iguodala, who was left open.
"Seven for 11, that's a pretty good night," Sixers center Spencer Hawes said. "You kind of have to pick your poison, and tonight we might have picked the wrong one."
Curry, a standout point guard, and power forward David Lee also had big games for the Warriors.
Curry finished with 18 points, 12 assists and 10 rebounds even though he sat out the fourth quarter. Lee had 18 points and seven rebounds in three quarters.
Evan Turner and Michael Carter-Williams led the Sixers with 18 points apiece. But this was Carter-Williams' worst game of his brief career.
The rookie point guard made just 4 of 17 shots and had six turnovers on the day he was named the Eastern Conference player of the week.
"I made some careless turnovers, a couple of tipped passes on careless mistakes on my part," Carter-Williams said. "You know my shot was not on. I was trying to make plays and take an open shot. As a basketball player, you have to do that: Stay confident on your off nights."
The Warriors held a commanding 39-point lead in the third quarter before resting their starters in the fourth. Things were so out of hand that the Warriors reserves were teasing the Revolutionaries, the Sixers' rowdy fan club.
The Sixers made just 5 of 25 three-pointers, shot 35 percent from the field, and committed 24 turnovers.
"I do admit we were sloppy," Sixers coach Brett Brown said. "We were careless. A lot of that had to do with their defense."