Tea Party always had financial big money behind it and had a lot more uniting it (hatred of Obama) that could survive even their internal bickering with the GOP establishment. Look at how quick some of the tea party types like Rubio and Cruz managed to become Establishment even after getting elected on the Tea Party platform. The one thing BLM has done is expose how reactionary white people can be, they have likened them to the KKK, had a state enact Blue lives matter law, generated "All lives matter" hashtag in response. This has come from all sides by the way, the moment BLM disrupted Dem events you would see what the Reddit supporters of the candidates were saying in response.