source: seelan palay
It indicates the effort to subsume and associate the very idea of the 'individual' with the party and its ethos - as in, one being unable to exist without the party, or the party being the ‘first cause’ of all reality. This is not as well implied if a regiment of men were to march behind a single flag. This is further amplified by the sea of white (outfits) blending almost seamlessly with the white flags. In this, the individuality of those comprising the marchers is further diluted. In a sense, this goes quite well with the age-old Chinese ethos where the masses are generally inclined to act as one unidirectional organism moving in rhythm with the dictates of the ‘Son of Heaven’.
Additionally, it also gives one the impression of force by numbers, as the viewers in the grandstand, who would certainly be more numerous, aren't as well defined as one in consciousness as are the marchers.
However, rather than just focusing on these superficial similarities between the PAP and the Nazis, more astute minds would also be cognizant of similarities on the basis of traits and perspectives. In this, one could most plausibly argue for the fascist nature of the opposition themselves, i.e. with their hero-worshipping, xenophobia, oversights in the face of the interests of the non-Chinese, discounting of critique from the masses, etc. In this, we could say, that the agenda of the party in power has been achieved where the opposition, the supposed saviours of the masses and’ alternative’, is quite the living breathing example of the perspective of the proposition in many significant respects.