I think a lot of it was down to LA Comic Con not being content to just run Lafayette. Had they not tried to move back into Shreveport things wouldn't have gotten heated. But they saw Shreveport as a defeat for them (their first show was there, but they way underestimated the crowd size and booked a tiny venue and the lines were nightmarishly long and it was just unpleasant) and after getting their organizational structure sorted out, they wanted back in, seeing Geek'd Con as stealing their thunder.
And they weren't subtle about it, either. They actually had volunteers handing out fliers AT Geek'd Con's entrance that year advertising LA Comic Con as Shreveport's "original" comic con. So they really picked a fight that never needed to be picked.