As if that were not enough, another dispute threatens the Church's unity - over women bishops.
But although his phrase was over-simplified and implied a unity of behaviour and purpose between Iraq, Iran and North Korea that does not exist, he was nevertheless putting his finger on a real issue, one that is separate from the fight against terrorism.
On Thursday, Basil McCrea and John McCalliser quit the UUP over its decision to support a unionist unity candidate in the Mid-Ulster by-election.
Given bipartisan enthusiasm for more spending on education and the armed forces, that would seem a plausible solution, but one that will annoy Republican conservatives, involve haggling over other spending programmes, and strain the unity of the Republicans' six-seat majority in the House.
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Yemen's vice-president has issued a decree creating a national unity government to take over from that of President Ali Abdullah Saleh.
Both men have quit the Ulster Unionist Party over the decision of the party to support a unionist unity candidate in the Mid-Ulster by-election.
This group will take over as the largest generational segment in the luxury consumer market around 2018-2020, according to Unity Marketing.
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She said that, four years later, the award still contributes to a feeling of unity among the agency's more-than 2, 000 employees who come from over 100 different countries.
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Mugabe's ZANU-PF party and Tsvangirai's MDC party have been negotiating over the distribution of cabinet posts in a unity government.
The president, traditionally a widely respected figure supposed to be above the political fray, can also play a critical role in fostering national unity, which could prove vital now as politicians squabble over how to rebuild Italy's recession-mired economy.
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