Why did the marriage between Othello and Desdemona fail?

Usually, whenever a marriage between two people falters,
one can parcel out blame and responsibility in a fairly representative manner to both
parties.  I guess I am going to go against this and place much of the blame for the
marriage's failure at Othello's door.  I think that Othello's fears and insecurities
ended up overtaking his own judgment and sense of trust.  Rather than openly discuss his
fear with her, Othello harbored them in his own subjective and then started to use them
as a way to view Desdemona and her actions.  Of course, all of this is triggered by
Iago's treachery and had he not been so skilled in manipulating Othello, the marriage
probably is saved.  Yet, Othello's own insecurities regarding age, social status,
ethnicity, and psychological sense of self all contribute to destabilizing him and his
marriage for he is unable to understand and appreciate Desdemona's own authenticity and
love for him.  In this, the marriage fails.