Complex sentence: Loghain loathes Orlesians due to his family suffering during Orlais's occupation of Ferelden long before King Maric repelled the Orlesian Empire; however, his obsession with Ferelden's independence blind him to the true threat of the Blight.
Split into simpler sentences: Loghain loathes Orlesians due to his family suffering during Orlais's occupation of Ferelden long before King Maric repelled the Orlesian Empire. Whatever the true reason behind Loghain's actions, Loghain appears obsessed with securing Ferelden's independence and blind to the true threat of the Blight.