I may be wrong, but I think suicide may be somewhat acceptable in some Asian countries, at least, compared to some western countries.
According to the World Health Organization, the rate of suicide in Malaysia is close to the lowest on the planet; a tenth or so of rates in European countries.
The rate of suicide-by-loaded-aircraft amongst pilots is vanishingly low as well; statistically it's zero plus noise. Pilot suicide is a highly unlikely explanation for this incident. Unfortunately, so are all the other possible explanations.