Why all the hate on Danzo?

[homer uchiha]

Danzo is a necessary ingredient in the shinobi world, a man whose methods are frowned upon but is needed, even itachi and shisui knew this.

 

[johnny335704]

Danzo did a lot of illegal or unethical things in the background so questions were raised over his true motives always.

 

[DMT]

Danzo , did what any real Shinobi would do