Im not sure that anyone here has actually cast judgment on her at all, but have only said that she is wrong and is not speaking from the word of God.
As for Christians and judgment-
"Open thy mouth, judge righteously, and plead the cause of the poor and needy." (Prov 31:9)
Jesus commended Simon, "Thou hast rightly judged." (Luke 7:43)
"But he that is spiritual judgeth all things, yet he himself is judged of no man." (1 Cor 2:15)
"Do ye not know that the saints shall judge the world? and if the world shall be judged by you, are ye unworthy to judge the smallest matters?" (1 Cor 6:2)
"Know ye not that we shall judge angels? how much more things that pertain to this life?" (1 Cor 6:3)
If we are to never make any judgments ever, how do we know who to follow? This woman claims to teach the word of God, and also advocates sin. So yes, we should judge whether or not shes truly speaking the word of God.