The 'Island Boys' -- the Florida twins behind that viral TikTok song -- are struggling to understand why haters are coming at 'em so hard ... after their hairy showdown with hecklers at the Jake Paul fight.
Flyysoulja and Kodiyakredd tell TMZ ... they expected a love fest this weekend when they strolled into Tampa's Amalie Arena, but instead quickly discovered some folks were pissed to see them in ringside seats.
The 'Island Boys' say there were there just there to watch the fight ... and they want to clear up any misconceptions about them picking fights to get clicks or clout chase.