People have a right not to care about the planet. One person's demand that another should change their behaviour to help the environment or prevent a climate catastrophe is no more valid than another person's demand to carry on flying, eating meat and driving a Range Rover.
Both believe that the other is wrong and that the other should change their behaviour because of their own actions or beliefs. Arguably the second person has a more valid point, because climate change will only be a significant problem in the future (as in, extinction of the human race) whereas the first person demands sweeping lifestyle changes immediately.
Anyway, we live in a democracy. If enough people want climate issues to be put front and centre, they can vote for politicians that espouse these views. If those politicians don't exist, people can stand knowing they've already got huge numbers of supporters on tap. Democracies don't elect leaders based on who shouts the loudest or has the largest mob of thugs behind them, they elect leaders through argument and debate. Peacefully.