Except in states with open primaries Democrats don't get to vote for candidates that don't get the party nomination (such as the two you've named). More to your point, Cruz is white. Having a Spanish European last name doesn't suddenly change a person's race.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.