In order to answer this question, one has to liberate the argument from its geopolitical and ideological confines.
Many in the media (Western, Arab, etc.) use the reference "Islamist" to brand any movement at all whether it be political, militant or even charity-focused. If it is dominated by men with beards or women with headscarves that make references to the Holy Koran and Islam as the motivator behind their ideas, violent tactics or even good deeds, then the word "Islamist" is the language of choice.
According to this overbearing logic, a Malaysia-based charity can be as 'Islamist' as the militant group Boko Haram in Nigeria. When the term "Islamist" was first introduced to the debate on Islam and politics, it carried mostly intellectual connotations. Even some "Islamists" used it in reference to their political thought. Now, it can be molded to mean many things.