etad-artho hi loke 'sminn
avatāro mayā kṛtaḥ
vadhyā me dharma-dhvajinas
te hi pātakino 'dhikāḥ
etat -- for this; arthah -- purpose; hi -- indeed; loke -- into the world; asmin -- this; avatarah -- descent; maya -- by Me; kritah -- done; vadhyah -- to be killed; me -- by Me; dharma-dhvajinah -- those who pose as religious; te -- they; hi -- indeed; patakinah -- sinful; adhikah -- most.
Lord Balarama was not prepared to overlook Romaharshana's offense. The Lord had descended specifically to eliminate those who claim to be great religious leaders but do not even respect the Supreme Personality of Godhead.