It is interesting, if one of the reasons why Malaysia is used as a major transit site for terrorists is usability of airports or many destinations of airline careers whose hub airport is Kuala Lumpur International Airport(KLIA).
In terms of geography, Malaysia may have better accessibility.
・Locating between East Asia and Oceania
・Having many Moslems
・Reliable safety
But, if Malaysia is marked as a famous transit site, I guess terror groups are likely to avoid recruiting their members in Malaysia.