It's not about Islam
I write from Malaysia (hence AC, natch).
This has got absolutely nothing to do with "insulting Islam".
Six months or so ago, the ruling coalition in Malaysia suffered a big smack in the face in a general election, although not big enough to lose its majority. Bloggers, and a new sense of freedom of speech, were largely responsible for people having the confidence to vote not for the Opposition parties, but against the status quo.
Since then, the former deputy PM, Anwar Ibrahim (who, IMHO, is just as much a knut as Najib) has had his suspension from political activity expired (following a sodomy conviction in 1998), and won a bye-election campaign (caused by his wife's resignation) on the platform of taking enough MPs from the ruling coalition to win a no confidence vote.
During that campaign, a prominent Malay politician described the Malaysian Chinese as "squatters" and "immigrants". That went down like David Irving at a Guardian-readers' conference, to put it mildly, and the government's response to what was in most people's opinion a flagrant breach of the spirit of the Constitution, was perceived as, at best, cowardly and pissant, and pandering to Malay supremacists at worst, and was called as such by prominent commentators, leading to the original arrests.
Raja Petra, Teresa Kok (no sniggering at the back), et al, have been vehement in their criticism of the government's use of the ISA to silence legitimate dissent, both of which have escalated since the deadline of September 16th, which Anwar had set for the crossover of MPs. Indeed, even the law and order minister, Dato' Zaid Ibrahim, resigned from government in disgust at the use of the ISA for these purposes. Teresa Kok today had her suit of habeas corpus thrown out in court on the grounds of (I paraphrase) "well, you're out now, what are you complaining about?"
So to conclude, this has nothing to do with "insulting Islam", and everything to do with propping up a government that has totally lost face and faith with the electorate.
Black Helicopters, cos, well, ain't it obvious?