In many varieties of activism, there’s a drive to argue that our cause is the most important thing in the world, or at least somewhere up there among the top priorities.
For example, in atheism, there has long been the notion that religion is the “root of all evil” or that it “poisons everything”. I think most people who say that are being hyperbolic, although it’s hard to say to what degree. Certainly, there is a conscious attempt to assign religion more blame for the evils of the world.
In some socialist/communist/Marxist circles, it is argued that class struggle is the root of all oppression, including the oppression of women and ethnic minorities. And sometimes it is argued that much of feminism is pointless because all it fights for is for more women to become part of the ruling class.
There are also some feminists who have tried to interpret everything through the lens of feminism, for instance blaming homophobia and transphobia on the patriarchy. Gender critical feminists (aka TERFs) demonstrate an extreme version of this thinking; they argue that trans people’s problems will go away once we abolish gender.