I want to dispel some of your misconceptions about Nathan.
1) He is not a stupid guy. Like all Indians, he is a sneaky forked tongue asshole. But he did put himself thru university (U of Malaya)and got a undergard degree with honours. SO, he had the intelligence and the discipline to pull that off. Every one that served with him say he is intelligent and smart.
2) During WW2, it was not unusual for the Kampetai to use Malays and Indian locals to work for them. This is because they were counting on the natural distrust from these 2 groups against Chinese. And they wanted the chinese controlled and under surveillance. Unlike Old Fart (very unusual to have a chinese working for the Japanese against other chinese) who had some money, Nathan was dead broke and probably needed the money badly from Japanese pay. that does not forgive him for what he did.
3) Today, this clown would never head the SID. He headed the SID because it was new unit being formed and not one knew anything. It was blind leading the blind. Even today, my experience of SID is that they are still a bunch of clowns. Not one of those idiots can tell you what is the military threat to singapore today and where is it coming from. So, in my opinion, it was not a big deal that he was SID first head.
4) He was the protege of Devan Nair from the time they were dealing with the unions and the communists. Later on, when he got posted to MFA, Rajaratnam took him under his wing. because he got these 2 godfathers, and because he was blindly loyal, he got increasing posted to higher levels. his career got hanta kaki for 15 years after Devan Nair got fired from the presidency. Old fart did not trust any apunehs and especially those that were proteges of Devan Nair. His career was revived by Gay Loong after became PeeM because Gay loong knew him from his days at SID when he was BG.
5) The whole Laju incident is really fishy. There is an untold hidden story there. Nathan was made to look like the hero, but actually, the 4 hostages were exchanged for 13 govt hostages, of which nathan was one. Technically, the other 12 should get equal credit. In the first place, u never negotiate with terrorists. He did. And secondly, you don't give the terrorist new 13 hostages for 4 old one. How stupid is that? nathan only agree to go as a hostage after 4 commandoes were disguised as part of the 13 hostages, they were basically his bodyguard. They had the opportunuty to overpower the terrorist after the terrorists surrendered their weapons. Why would the 13 of them get on a plane with the terrorists and fly all the way to Kuwait City and release them there and then fly back to Singapore. Shit, just shoot them dead after they surrendered the weapons. What is the problem? Really a fishy business.