The Post's editorial on Angola {Oct. 8} ignores critical facts that reveal the absurdity of urging more military aid to UNITA to bring peace to Angola. In reality, increased U.S. military aid is the only impediment to ending this 15-year-old war and bringing democracy to Angola.

The Angolan government (along with the Soviet Union) has already agreed to halt immediately all Soviet aid as soon as U.S. funds stop going to UNITA, Angola is already adopting a multiparty and free-market system, and its commitment to democracy is irreversible. Angola is negotiating directly with UNITA, giving it de facto recognition as an opposition party. The government has asked UNITA to join in the rewriting of the constitution to prepare for free and fair elections and offered an immediate cease-fire under U.S., Soviet and international supervision.

UNITA has refused to accept a cease-fire, refused the ''triple zero'' option that would cease all military aid from the Soviet Union, the United States and any third parties, and refused to join in the constitutional rewrite to allow multiparty elections.

Angola's revamping of its political and economic structure is not a result of ''pressure'' from U.S. military aid to UNITA, but a realization similar to that in Eastern Europe and the Soviet Union that Angola's previous system was in need of reform.

All that U.S. military aid will accomplish today is increased suffering for Angolan civilians, who have already endured an estimated 341,000 war-related deaths and the highest amputee and infant-mortality rate in the world. Further, increased military activity seriously hampers efforts to bring relief supplies to the estimated 2 million civilians facing starvation. Finally, lethal aid provides an incentive for UNITA not to negotiate seriously and to continue to refuse to accept a cease-fire.

One wonders if the United States would be so quick to rush money and weapons to continue a war against a country already agreeing to adopt both democracy and free enterprise, if the resulting war victims were white. AUBREY McCUTCHEON III Executive Director Washington Office on Africa Washington