Is it ever OK to be rude ?

Over the weekend I heard a story that I had never heard before. It started with a baby being born out of wedlock quite a few years ago. From what I understand the father ( who was an adult at the time) didn't deny the child but for what ever reason decided not to marry the baby's Mother nor give the baby his name.The father did however maintain a relationship with the child .I understand that the mother and this baby lived close to a lady whom I have known and respected for many years who just happened to be the paternal grandmother of this baby.Now as many of you remember, back in that day this sort of thing was not acceptable at all. This being said one day this woman who I deeply respect was walking to the neighborhood store when the mother of her son's baby approached her and asked if she cared to see her grandson. As the story goes this woman in no uncertain terms commented "no" as she quickly kept walking. The person telling the story, who was accompanying this woman to the store that day made a point of mentioning how rude this woman was to her grandson's Mother. I was shocked that this woman had it in her to be rude to anyone let alone someone who had done nothing but offer her the chance to meet her grandson. The person telling the story noticed my shock and explained that this just was not acceptable and this woman simply didn't want anything to do with the whole thing. I guess that considering the time I can almost understand her reaction but I can not grasp where she felt justified to be rude.
This story has me thinking of many cases where people have been rude not only to me or to someone I know but people in general as well as times that I may have been the least bit rude to anyone. I now question is this ever OK ?
A couple weeks back I was reading an open comments Catholic blog where Natural family planning was discussed. A couple woman chimed in to admit that they struggled with natural family planning until they felt that they could not any longer and decided to undergo sterilization procedures or use birth control. Now it is no secret that the Catholic church sees both birth control and sterilization procedures as sinful, and quite a few of the Catholic church's most self righteous were all over these women rudely bashing and condemning them . Now I understand that there are many Catholics( as well as Christians and many other religious groups)out there who feel that God has called them to spread his word by self righteously telling everyone else what they are doing that God doesn't like , be it abortion, birth control,homosexuality, or whatever. The part that I find funny is that these people are the worst examples of good and rightiousness that there is , and they want to fix everyone but themselves. Anyway, these people see no problem with being extremely rude to others. I guess that they feel entitled but it makes me ask again is there ever justified reason to be rude ?
I guess the bottom line is that I don't think that there is ever justification for rudeness. If something truly needs to be said ( and many times trust me, your idea of what needs to be said, really doesn't)it can be said with love. Rudeness never helps anything.It will not take away what is ( your son having a child out of wedlock )It will not bring people closer to God, ( rudely informing them that they are big fat sinners )It will not accomplish anything ! So next time you get in a huff over some one's words or actions, maybe you will think of today's words and decide to forgo the rudeness. It may just make things better for all involved.