Sorry if I am being unpolite, but this is what I think.
-As Playmobil is German, they do not want to enforce a bad image of Germans as nazis, they would not want to make something that gave some bad name to all them. I suppose no US toy factory would produce an Enola Gay toy, or napalm bomb toys. I suppose no southern US toy factory would produce Civil war soldier toys. I know this reasoning not always holds, as there was a comparable anhilation of American natives yet we still have toys of indians versus Western soldiers and cowboys.
-Even if they want to make them, as long as their WW II foes, just by sake of garden wargaming, sensitive persons, with families suffering the Holocaust (or opportunist people, with a less moral interest) may sue Playmobil for promoving nazism if not portraying the nazis as clearly bad (what is much more difficult for a toy than for a movie). Indeed, perhaps by ignorance, but except for Lego (which also had problems, and can give more reason to avoid making nazis), I do not know of toys performing nazi soldiers.
-Neonazis may get angry if nazis are depicted as bad and sabotage Playmobil (there may be many there)
Thus, it seems the most logical for them to avoid making nazi clickies, and to avoid showing nazi scenes in sites that depend on them or at least request to use their logo.