We have to agree with The Post when it says that what's happening in Sri Lanka is not fair, but we must disagree when The Post goes on to add that the problem is India {editorial, June 11}.

We did not create the ethnic crisis in Sri Lanka, nor have we encouraged either the Tamils (or any breakaway group) in Sri Lanka in acting against the integrity and unity of Sri Lanka. The ethnic crisis is a result of longstanding discrimination against the Tamil minority in Sri Lanka, and India's involvement as a mediator providing its good offices arose after it was sought, in the wake of the large-scale violence that engulfed Sri Lanka in July and August 1983.

Since then it has been our persistent efforts toward narrowing the differences between the two sides in Sri Lanka that eventually led to what have become known as the "December 19 Proposals," which had the initial approval of the Sri Lankan government. Even before they could be communicated to the other side, the Sri Lankan government officials had second thoughts and imposed an economic and communication blockade and escalated military action in Jaffna peninsula, where 800,000 people live, of which 90 percent are Tamil.

This blockade has been in force since the beginning of January, and the supply of fuel, gas, firewood, medicines and even food items had been suspended. In May, the Sri Lankan government launched a major military offensive against the population in the Jaffna peninsula, which it described as a "fight to the finish." Yet, by a strong logic, The Post editorial states that "it is not that the Sri Lankan government any more fails to see the urgency of treating the fair grievances of the Tamil minority" and calls the air-dropping of relief supplies of India a "rude intrusion."

This extraordinary, distraught situation in the Jaffna peninsula was what compelled India to send a convoy of boats with relief supplies, a convoy under the auspices of the Indian Red Cross, unarmed and without armed escort. When these boats were turned back by the Sri Lankan navy, there was no option left for India but to air-drop the relief supplies.

Our commitment to a peaceful, negotiated solution of the ethnic crisis in Sri Lanka, meeting the legitimate aspirations of the Tamil minority, in the context of the unity and integrity in Sri Lanka, remains. India has condemned the use of violence, no matter which group has indulged in it.

The Post reminds us of our problem with our much bigger neighbor, China. Permit me to bring to The Post's attention that, conscious as we are that stable and friendly relations with our neighbors is of the utmost importance to us, and committed as we are to negotiated solutions of bilateral issues, we have reiterated our desire at the highest level to resolve these issues amicably through discussions, and toward that end it is India that has initiated contacts at the ministerial level. S. S. MUKHERJEE Counsellor (Press) Embassy of India Washington