While it seems to be "so loud lately", it is actually toned down from what it has been at times. The greatest modern charge against Christians seems to be "being judge mental", but it takes judgment to make that charge. If it is a sin, it seems to be pretty much universal, but no group has it used against them as much as Christians. Why?
FWIW, we are supposed to be judgmental.
We have been told how to live and to judge one another. We are not supposed to condemn those that are doing the same things we are doing. We are both supposed to stop and after we take the plank out of our eye help our brother take the plank out of his eye. That does not mean we are to live like pagans so we don't seem judgmental of pagans.