See , but my issue lies in the fact that the Quarians made a mistake , and never really fess up to it . First , they create the geth , which they knew they were skirting a line on . when the geth become sentient , they try to ignore it , then they try to reprogram then just destroy . There was no , okay we made a mistake , let ' s work together . It ' s basically the Quarians fault they got kicked off their home planet , and they just can ' t get over it . I think the geth show a kind of complex thinking that is worthy of remaining alive and being preserved . They clean Rannoch to honor the Quarians . Maybe I ' m wrong , but the geth are like the Rachi . You could say that a hive mind isn ' t worth keeping but I personally think it would be . But I chose synthesis in the end . It fit my ideals of how AIs should be treated pretty well .