Interesting that you have now changed the subject from a generic discussion of "Soviet genocide" to your link to a specific instance (i.e. Ukraine). Apparently, you have difficulty with precision in your use of the English language.
However, as even your own link shows with respect to Ukraine, there was evidence presented BEFORE 1988 re: the Ukranian genocide.
With respect to your comment that I don't understand the difference between "murder" vs "genocide"
MURDER:
noun: unlawful premeditated killing of a human being by a human being
GENOCIDE:
noun: systematic killing of a racial or cultural group
United States scholars, researchers, and politicians recognized Soviet GENOCIDE years and decades before 1988 -- so stop playing stupid word games or semantic parsing of terms.
I suggest you review some of the following documents for evidence and discussion about Soviet genocide.
I'm only listing a representative sample merely to indicate how absurd your comments thus far have been.
I won't even get into all of the anti-Communist organizations that published articles and booklets pertaining to Soviet genocide and murder and oppression -- but suffice it to say that such organizations have existed since the 1920's throughout the non-Communist world. In our country, for example, there were groups such as American Coalition of Patriotic Societies (founded in the 1920's) and The Council Against Communist Aggression founded in February 1951 headed by Arthur McDowell.
I also will not bother to list the scores of Congressional hearings and reports which dealt, in one way or another, with Soviet violations of human rights and mass murder, etc.
I will not respond further to your nonsense because you obviously have never done even the most cursory investigation into this subject matter.
See for example:
Genocide in the USSR; studies in group destruction by
Nikolai K Deker, 1958
The Soviet empire: prison house of nations and races;
a study in genocide, discrimination, and abuse of power.
Library of Congress., Legislative Reference Service.
Washington, U.S. Govt. Print. Off., 1958
Human rights and genocide in the Baltic States :
[a statement submitted to the delegations to the United Nations General Assembly, September 1950] /
Author: Kaelas, Aleksander.
Publication: Stockholm : Estonian Information Centre, 1950
I accuse the Kremlin of genocide of my nation :
based on the secret documents of the Military persecutors and N.K.V.D. of the U.S.S.R. /
Author: Abramcyk, Mikola.
Publication: Toronto, Canada : Byelorussian Alliance in Canada, 1950
Genocide behind the iron curtain :
short history of repressions by the Soviet government, aimed at the extermination of pious Moslems in the Crimea and the destruction of djami, their houses of prayer /
Author: Akchura, Iskender.
Publication: New York : Rausen Bros., 1963
La Práctica del genocidio en el Soviet.
Publication: [S.l. : s.n., 1952-1959?
Document: Spanish : Book
Soviet policy of deportation : genocide or manifest destiny.
Author: Donnelley, Verne George. Publication: 1970
Soviet genocide in Lithuania by Joseph Pajaujis-Javis, 1980
The nation killers; the Soviet deportation of nationalities - by Robert Conquest, 1970
SOVIET GENOCIDE IN LITHUANIA
Author: SLAVENAS, JP; JOURNAL OF BALTIC STUDIES 13, no. 4 (1982): 368-370
THE POLICIES OF GENOCIDE - JEWS AND SOVIET PRISONERS OF WAR IN NAZI GERMANY - GELLATELY, R ; GERMAN STUDIES REVIEW 10, no. 2 (MAY 1987): 374-376
LETHAL POLITICS: SOVIET GENOCIDE AND MASS MURDER SINCE 1917 - RUMMEL,RJ
HOLOCAUST AND GENOCIDE STUDIES 6, no. 4 (1991): 430-434
Commission on the Ukraine Famine Act, CIS-NO: 85-H381-24, SOURCE: Committee on Foreign Affairs. House, DOC-TYPE: Hearing, DATE: Oct. 3, 1984, 37pp
Ukrainian Famine of 1932 and 1933, CIS-NO: 85-S381-5, SOURCE: Committee on Foreign Relations. Senate, DOC-TYPE: Hearing, DOC-NO: S. Hrg. 98-982, DATE: Aug. 1, 1984, 137pp
Collectivization and Its Impact on the Ukrainian Population and on Soviet Agricultural Productivity, CIS-NO: 84-S161-26, SOURCE: Committee on Agriculture, Nutrition, and Forestry. Senate, DOC-TYPE: Hearing, DOC-NO: S. Hrg. 98-959, DATE: Nov. 15, 1983, 124pp
Human Rights, CIS-NO: 84-S381-8, SOURCE: Committee on Foreign Relations. Senate, DOC-TYPE: Hearing, DOC-NO: S. Hrg. 98-563, DATE: Nov. 9, 1983, 198pp
Executive Sessions of the Senate Foreign Relations Committee (Historical Series). Vol. 2, CIS-NO: 76-S381-19, SOURCE: Committee on Foreign Relations. Senate, DOC-TYPE: Hearing, DATE: Jan. 14, Feb. 2, Mar. 11, Apr. 19, 1949, Jan. 31, Feb. 3, 7, 25, 27, Mar. 10, 21, Apr. 4, 12, May 23, June 6-8, 16, 19, 23, July 18, Aug. 1, 10, 11, Sept. 6, 1950, 840pp