I am not agreeing or disagreeing with that, but so what if he does? He is a private person and you don't have to consume his politics just as I don't consume his political opinions or consume any trash on Facebook. It is the nature of liberty that people are allowed to express opinions you find offensive.
Its a question common to campaign contribution and whether super PACs are to be considered free speech.
That isn't a problem. Private individuals are not required to abide by a fairness standard when it comes to speech. Taken a step further talk radio stations are often extremely right wing are not required to fairly convey an alternate position. I am fine with that because as a consume I am not forced to consume it.
The question of who is providing and controlling infrastructure is a real threat to protest movements, as it is easily possible to co-opt a political movement through funds this way.
We have clear limits on what lobbying is allowed to do and what kind of interference in a democratic system through funds is prohibited. Take vote buying as an extreme example or simply the ordinary regulations over campaign financing. We dont have that clear cut rules for what is acceptable in the case of non parliamentary political movements. Calling the targeted funding and co-opting of political movements problematic is appropriate in my opinion.