It is certainly a very good thing to question things you do not understand. Providing you do it with civility no one should ever object to that. Are you always civil? Why?

yes, its not my style to be rude

Even the most mannered among us can become angry and be right in doing so. There is such a thing as a righteous anger that says that some things cannot be tolerated at any time, nor compromised with. Yes, one can be angry and not sin.