Showing Grace and Mercy

I've recently seen a new "fad" you could say. Christians bashing Christians. It breaks my heart, it bothers me, and when I see it I go to say something and then have no peace. I don't want to be part of another phase of bashing, yet feel convicted that I'm to go to my sister(s)/brother(s) in Christ and well tell them to stop.
I don't understand the constant crowing from some who are saying "show grace, show  mercy, be forgiving" yet what do they do "That's a fine example of a Christian" in a sarcastic tone. "This is why unbelievers hate Christians", etc. It is so hurtful, it groups all Christians into this one group.
I am not perfect, I don't know a soul who is other than our Lord, Jesus Christ. I know I don't always show grace and mercy, like I should. I so hope and pray I'm not seen as someone who bashes others. I want to be known as a Christian and that my love for Jesus shined from me, as a wife, mother, etc....but most of all as a Christian and I want to represent Christ in the best possible way.
I know I often fall miserably in showing his love, grace, and mercy more days than I like. Let those who care about me or even just know me, and see me in my sin, that they'll show enough grace to call me out in my sin.