Uhm...No.
I was here!
OP What is your definition of 'loyal'?
What exactly do you mean by Loyal?
This is my favorite .gif of all time!
OP, you don't think this thread will cause division? It's sorta like dudes in high school telling you, they will only put the head in and expecting you to belive them.
To answer the OP's question -
According to the U.S. census, black men are most loyal to black women in terms of who they will marry, White men are the least loyal, making up the most interracial married couples to asian women. (I've done work in public finance.) So to that extent, they are loyal.
Black men as a whole, are not loyal to black women as a whole. I think black men are loyal to certain, or certain types of black women though.