Defiant Knicks fans flooded into enemy territory Friday night for Game 3 against the Philadelphia 76ers — in a swift rejection of Joel Embiid after the Philly star whined that New York’s faithful are not welcome in the City of Brotherly Love. Dozens of diehards traveled down the Turnpike by chartered bus to Xfinity Mobile Arena in a bid to “really piss Philly fans off” as the Knicks look to take a commanding 3-0 lead in the Eastern Conference semifinals. “We’re gonna fill the place up with as