We have no biblical right to judge the souls of other professed believers. We do, however, have the biblical right to judge their actions, if those actions are sinful and harmful to themselves or others, as well as being an affront to God.
Yet, especially today, there are some who will wave the flag of legalism every time someone dares to call sin, sin and do something about it.
These brothers and sisters will quote from legitimate exposes of clerical abuse for illegitimate reasons that revolve around a desire to turn Christian liberty into license.
This can be, and often is, a rationalization of the indulgence of the flesh under the banner of tolerance and it has no place in truly Christian communities.
“As for those who persist in sin, rebuke them in the presence of all, so that the rest may stand in fear.” -1st Timothy 5:20 (ESV)