I haven't read Mein Kampf or the Koran but I still have a negative opinion of Hitler and Muhammad. I have the same feeling about Escriva and Opus Dei.
Someones writings and slick PR campaigns are not indicative of the underlying organization. Infomercials on how to get rich working at home come to mind.
How anybody can favorably compare this "Saint" to St. Francis or St. Benedict is proof that there is "one" born every minute.
Hitler was responsible for starting history's most horrific war and murdering 12 million non-combatants. Muhammad is the founder of a belief which encourages killing innocents for religious glory. What is it about Opes Dei that upsets you?
And you should at least try to read Mein Kampf & the Koran. They can be found on the web albeit I merely skimmed Mein Kampf & couldn't finish the Koran.
Your (correct) "negative opinion of Hitler and Muhammad" is certainly based on reliable reports, however. But isn't the difference clear when compared to St. Josemaria? Is your negative opinion of him based on serious, reliably, scholarly work, or on fringe rants from biased sources? Remember, you are contradicting a definition of the Roman Pontiff - doesn't that deserve at the very least a closer look?
*That takes nasty irrationality to a whole new level.