On 11 May 2021, Fact-checker First Draft News found that Chinese- and Cantonese-language versions of Radio Free Asia (RFA) published anti-vaccine misinformation regarding the Chinese vaccines, particularly the ones manufactured by Sinopharm and Sinovac. The investigation found the RFA articles amplified misleading claims about the vaccine programs, and its stories were reprinted by popular tabloid newspapers to reinforce the anti-vaccine misinformation.
From Wikipedia: https://en.m.wikipedia.org/wiki/Radio_Free_Asia See the controversies section.
They can’t, their party leader isn’t in government and there’s three other parties keeping them in check (one of those is particularly twitchy about this sort of stuff).
Besides, Dutch law does not provide many executive powers that can infringe upon freedom of speech. There’s not a whole lot they could do even if they tried.