Just a reminder. It was Russians (not under Stalin but before) who SAVED Baltics nations from assimilation/eradication by Germans and Swedes. If for example Latvia had remained under German rule, Latvians would be today where Baltic Pruses and Polabians are (together with Tasmanians in the land of everlasting hunting ).
Second a significant parts of Estonia and Latvia were ethnically Russian for centuries.
Third, Estonians were part of Russia from the beginning, before MOST of Russians. They were one of the four founding tribes of oldest Rus (together with one Finnish tribe and two northern Slavic tribes) united by the fifth tribe of Scandinavian Ruses.
In any case the Russians did not save them from anything since they only imposed a communist tyranny on them responsible for more genocide than even the nazis.