Naturally colonials detest natives of any country and they hated Sinhalese, as the fought against them and refused to work under them in their grabbed lands.<quoted text>The problem with you is that you are copy and paste Sinhalese racist trying to legitimize your genocide.
Tamils took the advantage of the situation and submitted themselves as slaves to the colonials and in return colonials were more kind towards their loyal servants. That is how they became the civil service force in this country to help rule of colonials in this country. Sinhalese who didnt submit themselves to colonials were discriminated in every respect, and they became subjects of colonials and their supporting Tamil administrators.
Rectifying this historical injustice was the thing cited by Tamils, as the cause of the LTTE. You all can demand for rights not for privileges,dear friends. You shouldnt have expected privileges from Sinhalese you had from the colonials as a return for the service rendered to them. That was the root causes, not "Tamil grievances" incorrectly cited.
100% of the estate Tamils came as hired workers, true, and over 75% of the other Tamils also came here in the same process. Rest were the decedents of the soldiers of Aryachakrawarthi, who invaded this country in the last part of the 13th century. There is no much difference between estate Tamils and other Tamils in Sri Lanka. They all came within a period of 700 years and over 90% came here withing a period of 300 years.