Sorry about not being clear. I'm addressing the speaker in the video.

1. I'm saying that Greta is genuinely trying to raise awareness of the climate crisis, and fortunately, she is getting backing by people with power and wealth who have similar goals. But, unfortunately, some are politicians or disaster capitalists who are trying to gain from her popularity. Greta is simply carrying and publicizing the climate scientists' message, which has been ignored or even stifled by the fossil fuel interests for decades.
2. I have viewed interviews of Greta and her Father as they described how they got started, and yes, I believe every word they say. It's not up to me to prove anything. If you don't like what they are saying, in other words, you are calling them liars, it's up to YOU to prove it. Greta's parents were busy pursuing their demanding careers and were unaware of the climate change debate. It was Greta who studied the evidence presented by the climate scientists, and educated her parents and sister on the subject. Greta changed the entire lifestyle of her family. They became environmentally-conscious and vegetarians. Her parents scaled back their careers and stopped travelling by air, which is very polluting. Her father is now heavily involved with Greta's climate activist work. It's been Greta running the show from the beginning. People tend to judge Greta by her youth and unassuming demeanor, and therefore they vastly underestimate her integrity, intellect, maturity, and drive. She is a child in years only. I started counting how many times the people in the video condescendingly blow off Greta as a "16 year old mentally ill child," instead of LISTENING TO AND DISCUSSING HER MESSAGE, but I lost count.
3. Here's some of my ideas on how we need to deal with the climate crisis. First, we need to elect a president in 2020 who will end the US regime change operations and cut the military budget. This will free up funds for several important programs. A first program would develop an aircraft that can lay geoengineering particulates up at 60k-70k feet. These aircraft will blanket the entire globe including the oceans with a thin artificial cloud cover that will slow down global warming and hence give us more time to implement the following measures. We need to restore and protect natural carbon sinks such as forests, wetlands, etc. At the same time, we need to install carbon capture and storage modifications on all power plants that burn coal and gas. And third we need to build carbon removal plants at many locations around the world. All of these programs will be done concurrently and with great urgency. Only the government controls the trillions of dollars required, so we will need the government's cooperation. But, if Trump is reelected and doesn't significantly change his anti-environment views and deal with the climate crisis, I think we will see a climate catastrophe of biblical proportions.
4. At about 24:10, the speaker starts tying religious dogma with the climate crisis. This is about science, not religion.
5. I know this because she explained it, and like I said, if you don't buy it, see no.2 above. Greta said she was not aware of Antifa in the US.
6. I was talking about the speaker in the video. Like I said, there are many who are using Greta's popularity to make a buck - the channel I mean, not necessarily the speaker. This channel is gaining free content that's attracting a lot views. Well, at least it's not selling t-shirts or coffee mugs.
7. I agree that ad nominem attacks are not scientific. Funny you should say that. Have you really viewed this video?