From my own observation, these politicians have seen the growth of Bitcoin because initially they didn't believe Bitcoin will become this popular and more people developing interest to invest in it. The internet and other media are discussing about bitcoin every day and it's just obvious that these politicians have no other options than to disguise as though they are also in support of Bitcoin now but we all know that the government will continue to kick against Bitcoin because of it decentralized nature since they know they can't interfere in people's transactions and that is why they have not been upfront about Bitcoin.
Politicians will remain politicians because they are not stable with their utterances, today they say something, tomorrow they say a different thing. It has always been in their nature not to be straightforward and being deceitful so I'm not surprised that politicians are now demanding support and donations from crypto Enthusiasts and it is also a strategy to persuade people to vote for them since they have discovered that large numbers of people are getting involved in the crypto industry.