Tensions have flared because

The latest attack, on an Evangelical Christian church, caused limited physical damage-just a burned door and a charred entranceway. But the political implications may be more serious.
    Tensions have flared after Malaysia’s High Court ruled that a Roman Catholic newspaper, the Herald, was permitted to use the word "Allah" to describe God in its Malay language editions. Muslim groups argue that Christians using a word so closely associated with Islam could be a ploy to win converts.
    Christians make up around 9% of the population in the majority Muslim state. Most non-Muslims are ethnically Indian or Chinese. The row over the use of the word "Allah" has exposed deep resentments over the treatment of minorities and freedom of religion in Malaysia.
    A government minister told foreign diplomats on Monday the church attacks were the work of extremists. "These were not just attacks on houses of worship" he said, "these were attacks on the values and freedoms all Malaysians share." Under the slogan "One Malaysia", the government has made racial harmony a central policy. Its commitment to that policy is now being severely tested.