theMovement signee attacking Plat 2 team

Here is a hostile takeover attempt, lead by SINNEN (Sapphire 1) against DeutscheElite (Platinum 2), where HARLEM420 (Diamond 1) who is a signatory to theMovement letter posted on the forums, is assisting in the take over. This SS was taken late in the battle. Why is a Diamond 1 team helping a Sapphire 1 team steal a castle from a Platinum 2 team?