Why do airline professionals, whose careers have been most negatively affected by terrorism, strive so hard to accept any cause over even the mere suggestion of foul play? It doesn't compute
So which is worse - terrorism of some kind or an Airbus fault? Arguably terrorism is best. You have someone to blame, something easy-ish to do (reinforce security) and you don't have to deal with the direct and indirect economic impact of Arbus being considered to be unsafe and/or needing grounding