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No.
1. There was nothing about the lives of those that would have come about due to her living that were any less valuable than the lives that Captain Kirk and Mr. Spock knew of. Letting her die "killed" all those people as surely as all the ones they had known had been killed.
2. It may be that no one was killed in any case, and that the alternate just split off so that there were two different futures. In that case, letting her die was a personally selfish choice of "We think we can get back to our time easier if you get hit by a truck."
3. The most obviously glaring defect in the scenario though, was that Edith Keeler had shown herself to be an intelligent woman of great insight and broad acceptance of the unusual. She already suspected that Captain Kirk and Mr. Spock were different. In short, they could have simply told her, "Hey, don't advocate for peace, or Hitler will win and life will be bad." With suitable proof - which they had the means to provide - she would have gone along with that and all would have been well.
What else can I help you with?
When was Edith Keeler created?
Edith Keeler was created in 1967.
What are the release dates for FreakyLinks - 2000 Subject Edith Keeler Must Die 1-3?
FreakyLinks - 2000 Subject Edith Keeler Must Die 1-3 was released on: USA: 20 October 2000 Finland: 27 March 2001
When did Jackie Keeler die?
Jackie Keeler died in 2005.
When did Leonarde Keeler die?
Leonarde Keeler died in 1949.
When did Charles Keeler die?
Charles Keeler died in 1937.
When did Joseph B. Keeler die?
Joseph B. Keeler died in 1935.
When did Uri Keeler Hill die?
Uri Keeler Hill died in 1844.
When did W. W. Keeler die?
W. W. Keeler died on 1987-08-24.
When did James Edward Keeler die?
James Edward Keeler died on 1900-08-12.
When did Gertrude Keeler die?
Gertrude Keeler died on May 10, 1992, in Los Angeles, California, USA.
When did Helen Keeler die?
Helen Keeler died on November 4, 1981, in Los Angeles, California, USA.
When did Willie Keeler die?
Willie Keeler died on January 17, 1964, in Los Angeles, California, USA.
