Now we can't judge Obito...

[-ahhimane-]

Yeah true. But in the end he got brainwashed by Madara to continue his footsteps towards Madara's dream. Poor Obito

 

[Defendaga]

Most people seem to disregard how young he was at the time and how she was killed at Kakashi's hand, it would have made him very malleable to Madara. Interestingly, it's somewhat similar to how Darth Vader came to be.