The idea that Sri Lanka's opposition parties should unite to topple President Mahinda Rajapaksa and his government has surfaced yet again, with much discussion of a common Presidential challenger and speculation over likely candidates. Underlying this, is the assumption and claim, that the main opposition, United National Party (UNP) is the liberal antithesis of Rajapaksa's authoritarian, violent and Sinhala nationalist rule. However, quite apart from the UNP’s own history of rule, its politics of late suggests there are good reasons to be sceptical. Its recent clamour over human rights and other liberal values, belies a deafening silence on central issue of crisis for Sri Lanka – justice and accountability for wartime mass atrocities, and a political solution which addresses long-standing Tamil political demands. In fact leading UNP figures are explicitly supportive of the Rajapaksa government on these issues. Whilst the international community ought to take a closer, more critical look at the UNP's conduct, past and present, before assuming it to be the panacea to Rajapaksa rule, it beholds the leadership of the Tamil National Alliance (TNA), having secured its electoral mandate on justice, accountability, and the Tamil right to self-determination, to ensure these are the foundation of any alliance.