The loss marked the club’s seventh in nine Premier League matches, leaving them bottom of the table with just two points and still searching for their first win of the season.
With seven defeats and two draws so far, Pereira’s men sit six points adrift of 17th-placed Fulham as pressure mounts on the manager.
"We understand the frustration of the people and supporters but what I must say, if we fight united with them, we can win games and compete and achieve our targets - without them, it is impossible,” Pereira told the media.
“If we win two or three games in a row, things will change. Two months ago they sang my name, because together with the work we did last season, we are competing in the Premier League and not Championship.
“Now they sing my name to sack me. If I was a supporter, I would feel proud of my team because they worked and showed the spirit, mentality and ambition to win the game, even losing 2-0 (after 30 minutes)."
He added: "If you fight for 90 minutes to win a game and in the last minute when the other team was trying to get a draw, wasting time to finish the game, defending in a low block to defend the result, even if we draw it was not fair.
“We deserved the three points but it's football. I feel proud of my players because they showed in a very difficult moment, the mentality, the team spirit, the organisation to try until the last minute to win the game."