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An influencer can influence anybody, but they can't influence everyone.
I mean they can share whatever they want to, and not all will believe or support that thing. It's the same with this one.
At first, you love what he does until he posts anti-Bitcoin content. Ask yourself first. What's the reason why are you donating to that content creator in the first place? If you love all of his content aside from that anti-Bitcoin content then you can just continue donating and still subscribe to him. On the other hand, if you don't want him anymore just because of that anti-Bitcoin content then just stop donating and unsubscribe. After all, you are donating because you want to support him and not because he forces you to do it.
I didn't encounter this type of content creators TBH, but I guess if I were you, I'd just ignore all of his anti-Bitcoin content and will just focus on the other content that he's posting. Everyone has their own opinion, and if that's his opinion then there's nothing we can do about it, and as for you he didn't force you to donate or subscribe, but you did because you are showing appreciation to his content. Well, you can make a debate on him if you believe that what he's saying about Bitcoin is false. I mean many influencers are doing that.