Your perspective is limited, and shrouded by bias. If killing your own (the Uchiha clan consisted of a mere hundred or so) saves the lives of thousands of innocent than such is just.
Itachi hadn't a choice, as if he'd not gone through his clan, along with the village would've both experienced casualties. Think about this using a more open perspective.
Your comment in this thread wasn't required then, nor was it welcomed if your feeble mind cannot grasp that everyone has different opinions. Or are you just to immature to understand such a consensus?
Itachi, and Minato in the same aspect of leadership isn't a good analogy. Itachi would be a much better leader than Minato; naturally Minato was good in his own right.
There is nothing "easy" about this, I pray you open your perspective on the next reply, as I can see you're quite bias with the statement regarding Hashirama being the best hokage which is objectively to others incorrect.
In the end, Madara loathed for Autocracy, even before he was perceived "evil." -- I've no idea why you've stated Itachi abused "his people," everything he'd done was to make Sasuke refined in a sense, and clearly such succeeded in the end (i.e. Adult Sasuke) -- Itachi would never have sacrificied the Uchiha clan if such wasn't necessary, read my first reply regarding this quote answering why Itachi did what he did against the Uchiha. Innocence is the key answer.