I've touched on this before, but the word "nice" is not found in the Bible. Listen to Michael Voris describe why the desire to be "nice" may actually facilitate the eternal damnation of souls. (Click here if you can't see embedded video).
Some of us have been accused of "not being nice" when we show the true nature of abortion. Some of us have been accused of "not being nice" when we publicly rebuke those facilitating evil. To be clear, we do not engage in ad hominem attacks nor do we suggest or similate violence on anyone. We will, however, warn those who promote and facilitate baby murder that they jeopardize their immortal souls. What close friend of an individual wouldn't sound the alarm if that person were engaged in destructive behavior? We've no less duty to do so. (See the post a day ago regarding Father Rodriguez's example).
So let's stop trying to be nice and practice real charity!