In Pollock's Walsh, in the scene between Walsh and Sitting Bull in Act Two, how does Pollock indicate, through Walsh's language and her own stage...

At the
start of Pollock's Walsh, we learn that Walsh forms relationships based
upon the character of a person, not upon race. He immediately extends his
hand in friendship when first meeting Sitting Bull. After a moment of hesitation, Sitting Bull
decides to trust Walsh (as noted in the stage direction) and shakes hands with Major James
Walsh.

We also see that Walsh goes out of his way to help the Sioux. He has
no misconceptions about the Little Big Horn. Custer attacked the unsuspecting Sioux and was
killed; the Sioux were forced to defend themselves. And Sitting Bull has spoken to the Cree and
the Blackfoot who say that Walsh is "the Indian's friend."

When
Sitting Bull asks Walsh if he has had news regarding what is to become of them, Walsh reports
that Queen Victoria will not take care of them
(though George III promised they would).

As he speaks
in Act One, Walsh makes the distinction between his friendship with Sitting
Bull and his position with the NWMP.

WALSH:

I tell you this because I am a soldier and I must follow orders, but I am a friend
also. White Forehead...

He indicates himself.

...does not say this, Major Walsh says this.

He speaks
officially.

It is at this point that he reads
the US President's request that the Sioux return to the US territory.

By the
time Act Two begins, things have only gotten worse. Sitting Bull has met
with General Terry of the US Army: a man committed to the elimination of the
"savages," who shows no respect to the Sioux or their way of life.

MacLeod, Walsh's superior, chastises him for not following protocol in dealing with
stolen Canadian and US ponies. The British government is ignoring Walsh's many requests for aid
on behalf of the Sioux. In fact, Walsh has been told that neither he nor the settlers can offer
the Sioux anything to survive. The Prime Minister (as agent of Queen
Victoria) believes that hunger will motivate the Sioux to return to the United States.

Walsh is now witnessing the demise of the Sioux nation while he, under orders, can do
nothing. The Sioux people are starving to death. He has had to sentence one Sioux to jail
because he stole a cow from a settler to feed his family, even though the man offered the
settler his horse (his prized possession) in payment. When Sitting Bull comes the last time to
ask for help, Walsh doesn't want to see himwe can infer it is too painful for Walsh because he
is an ethical and caring man.

When they speak, Walsh reports that the Queen
has not changed her mind. Sitting Bull asks Walsh to send a message to her, asking for her
pity. Then he calls Walsh "White
Sioux"a name of friendship. Walsh is silent and staring as this great man humbles himself
to beg for food: "only a little."

Walsh
explodes, telling Sitting Bull to buy supplies or cross the border into the
US. Sitting Bull reminds Walsh:

You are speaking to the
head of the Sioux nation!

Walsh swears at him and says,
"Get the hell out!" When Sitting Bull draws his knife, "Major
Walsh" acts. He knocks the chief to the floor, and when Sitting Bull tries to
stand...

WALSH puts his foot in the middle of his back and
shoves him, sending him sprawling.

When Sitting Bull gets
to his feet, Walsh's final gesture is an act of White Sioux:

WALSH's hand slowly reaches out to SITTING BULL as [he] slowly
turns, takes his blanket and exits.

But there is nothing
more to say: the Siouxand Walshhave been beaten by British
politics and coercion by the American government.