Absolutely nothing except we both live on the planet earth.
Christians / Catholics - be more specific ! We share in common the Nicene Creed... That is the belief of all "Christians" [Catholics included as we are Christians as well]
They were created by God.
They all believe in one god.
Christians and George w Bush.
Well, yes we do! Why wouldn't we?? We are not idiots!
They all believe in one god.
The call to holiness that all Christians share is our common vocation.
All Christians believe that Christ died for our sins and was resurrected.
The most common is Buddisim or Hinduism, but you can find Christians there.
Buddhists and true Christians have no common ground.
Those Canadians who are also Christians would likely observe lent, in common with other Christians wherever they may live.
Not Christians specifically, crucifixion as a common form of torture/execution used by the Romans for the peoples they had subjugated and wished to humiliate.