Yitro

 The first of the Great Ten Commandments reads:

I am the Lord your God.
You shall have no other gods besides Me.
What is remarkable about this event is that it was a revelation to a people.  Until now God had only revealed His essence and Will to a chosen few.  Noah, Abraham, Hagar, Sarah, Jacob, Isaac and more were the pre-Sinai recipients of the Word of God.
After the Sinai experience revelation was again restricted to single people.  Moses, Manoah, Hannah and many prophets also heard God.  Never again was a people given the Message, only individuals.
One of the cited reasons for the mass revelation was that no one could say that they alone were privy to God.  No person could claim they they were singled out as special by the Holy One.  Every participant at Sinai was equal.  With this simple understanding of the greatest event in history unfolds the highest ideal for humanity.
Tazria is a skin ailment.  Some Sages declared that the skin disease only came because the person was  flawed.  they had sinned through their words.  The telltale mark on their flesh was an outward punishment of the malicious slander they spread.  Only atonement could wash that mark away.  Others tell that it was simply a disease that needed to be diagnosed, quarantined and cured.  Perhaps it was neither .  Perhaps it was both.
what is most telling from the Text is that when a person was seen to have the affliction people would cry out, tameh, tameh.  Unclean!  Unclean!
What humiliation!  Not only did they suffer the embarrassment of the disease it was trumpeted throughout the people.  There was no hiding from their shame now.
The Talmud questions why Tameh! would be shouted by neighbors.  It reveals that the word Tameh! was the call to pray for the person that was marked by the skin disease.  people were moved by the announcement to come out of their homes, their workplaces and pray for the person that was in emotional pain.  In other words, they were not shunned or turned out.  People were moved to action on their behalf.
Is this human behavior?  Do people really act this way?
Elsewhere in the Talmud there is a discussion about good and bad prayers.  What makes one worthy and another unworthy?  In a dramatic example the give the following case.  A person is coming home and they see flames leaping out of a house.  Immediatley they fear the worst and they utter a prayer, May it not be my house burning.  That is a vain and awful prayer.  Why? we may wonder.  Is that not a normal reaction?  Would not most people say a simliar prayer?
The Talmud tells us it is a bad prayer.  In essence the prayer has the undercurrent thought that it would be better if it were the house of someone else.  Not mine.  The prayer wishes the pain be placed on another person.  We are deliberately told to not say a prayer that insinuates another to suffer.
Somewhere deep in our minds is the belief that if another person loses we win.  Where our brother fails we succeed.  while we may overtly pity the entreprenuer that flounders and drowns many of us thank God it was not us....and the better chance we have to succeed with less competition.
The message of Sinai is that we all stand together.  When a member of the body is injured the body as a whole suffers.
In one of the most emotionally wracked tales I have ever read about the Shoah a father begs his rabbi to tell what to do  They face a Selektion.  At the notorious selections of the concentration camps people whoop looked weak were swiftly and brutally murdered.  His son, he told the rabbi, could survive the Selektion but only at a cost.  The Nazis were determined to murder a specific number of Jews.  If his son were saved another would die.  What should I do he cried to his teacher. 
What would Judaism teach?  How would it instruct us to make a decision?
May God protect all His people, it should never happen again, and yet we are faced with similar quandries every day.  How we choose to slander and malign others for their apparent deficits happens countless ties each day.  If we decide to cut off lashon hara, idle chatter about people or ruthless slander, that will impact the way we view ourselves and the way we see others.