I don't believe it. Everything they did and achieved required a huge organization and a lot of influential sponsors.
It should raise even more alarms how thus far every single critic of them even inside their own party was silenced or actually joined them!
I don't believe in threats as explanation on that scale. Many of those people are themselves well connected and influential.
I fear there is something deeper going on, and we will only find out by watching.
I hate this narrative that concentrates on Trump, or even Musk. Neither would be where they are now with a huge amount of active support. Whatever is happening is coming from inside the US. They may also be working together with foreign actors, but they act according to their own interests.