As MOD of The Family Forces I will address this. The original attacks on "ONE" RLMMO nation were intended as a tech raid albeit perhaps an Ill advised one, so if it were just that, and RLMMOS response were just against "Those" nations, then your point may have had validity. But RLMMO's response to this was to open a "Complete Front" against our Kronos allies, with the sole purpose of bringing a "Nuclear Holocaust" to their doorstep, which was their openly stated intention from the outset. This gos far and beyond any concept of reasonable defense, and was done without any attempt at diplomacy or mediation. Therefore this constitutes an overt act of aggression not in keeping with the original attacks, but is in fact a separate Casus Belli, facilitating our action through Casus Foederis.
In the end the RLMMO's actions were undertaken to "Make A Name" for themselves. Well they shall indeed get themselves a name, and it shall be carved on the tombstones of their nations.