Well they saved us from the Trump\Ryan care crap
They did.
And that has the Free Traitors up in arms.
Your theory about funding is a canard. Yes, the Freedom Caucus members did get funding from those donors, but so did many other politicians—and much more money, to boot. SOP.
The Freedom Caucus saved us and President Trump, for that matter, from a steaming heaping pile of a bill that would have bit Republicans and Trump in the behind in ‘18 and ‘20.
Trump got bad advice, and Ryan blew it by allowing the bill to be drawn up in secrecy without input from Freedom Caucus and other key Republican groups. Ryan confounded this early error by not getting enough support before introducing the bill to the floor and trying to strongarm it. Ryan was doing business as usual for the uniparty/governing elites.