User blog comment:IamJakuhoRaikoben/Chapter 497: The Winter Mage, Review./@comment-73.191.17.103-20160818134854/@comment-25111584-20160818171901

Jose ordered specifically ordered Gajeel to destroy the Guild Hall for the sake or provoking FT into attacking them. Gajeel didn't attack Shadow Gear for fun though, but because he thought that attacking an empty building would be insufficient and he's proofen absolutely right by Makarov's refusal to retaliate prior to finding Shadow Gear strung up.

Perfectly true. Doesn't change two main points:
 * Attacking SG was Gajeel's initiative.
 * Gajeel enjoyed beating up SG.

My initial post was not meant to support the comparison between GaLe and NaruSaku, but simply to clear the above points as your first description of Gajeel's assault on SG seemed incredibly lacking, no offense intended. So I don't think the second part of your post applies...