I agree, it is an incredible look into the mind of this leader. Whether you agree with his ideologies or not, it is a fascinating read. (just spent better part of an hour going through each of his posts)
Yeah, you can. It depends on your own personal philosophy, but the most common idea where this could be supported is (a slightly extreme version of) the greater good, or perhaps if you believe that the ends justify the means.
Disclaimer: I know very little about Cuba and Castro. Just being argumentative.