Fully behind them protesting.
Yes I'm sure the protesters could individually do more to help slow climate change like walk more, be more conscious of clothing choices etc.
However this was a protest on the governments failiures to protect us from our biggest threat to date.
These young people were taking a stand to protect their future. They're the ones who will see thousands of species die, water levels rise at alarming rates, extreme weather patterns, lack of food, poor air quality etc. And what does the government do? Jack shit quite frankly.
It may not make such a massive change now, but by causing people to discuss the movement it creates awareness of the issue. And when people become aware they may become passionate about it and help make a difference.
This isn't just a one off to be able to go on half term early. This is a worldwide movement that has already seen government ministers resign in other countries. This protest isn't an one off, it will continue for the forseeable future into governments wake up and realise the danger they're putting us all in.