It's ironic that John Gotti was celebrated for being this fearless rugged modern day Al Capone when in reality he was often shaking in his boots and not ashamed of it.

He expressed fears about the Demeo crew. He expressed fears about always being called by Paul Castellano to meet him at his mansion. He was afraid of many things and unabashedly so. He also was afraid to fly airplanes. No shame in his game. Someone like him, I think he most likely feared The Chin after Decicco got blown up. Put it like this. Gotti probably didn't know who exactly was responsible, and was then probably afraid of everyone. I remember reading somewhere that Nino Gaggi "summoned" Gotti to a meeting and Gotti got upset about it. Gotti had to know that Nino was acting like a Boss and had to have allies in the Gambino family and on the commission to do so. Decicco got blown up in 86. Gaggi summoned Gotti to a meeting probably in 87 or 88. So Gotti knew something was up and things were afoot.