Conservatives are liberals. Liberals are liberals. Libertarians are liberals. Neoliberals are liberals.
Liberalism has a storied, specific history. It is essentially support for capitalism combined with a set of other policies.
The modern, politico shorthand liberal/conservative dichotomy is an oversimplification, represents a split in opinions among liberals, and demonstrates the the narrowness of the Overton window, although "conservatives" can often lean toward fascism and democratic socialists are sometimes lumped in as "liberals" as well. Hell, right wingers call communism liberalism. That doesn't make it true.
This instance is constantly talking about the rise of fascism. However, like much of leftist thought, many believe that the ineptitude of capitalist, liberal parties and their policies, especially when they are positioned as "leftist", actually help give rise to fascism.
For example, the modern dominant strain is neoliberalism, which was actually first made popular by Ronald Reagan, Margaret Thatcher, and Alan Greenspan. However, neoliberlism has been continued by Clinton, Obama, and Biden. See the rise and support of charter schools in Democrat led cities, NAFTA, etc.
The rise of neoliberalism has coincided with the death of unionism and the stark increase in inequality since the 70s in e the US.
Also, most liberals, like conservatives, are opposed to socialism, which is seen by leftists as the most definitive obstacle to fascism. See the 2020 Democratic primary where all but Bernie Sanders were eager and quick to reaffirm their support and belief in capitalism and attempted to smear Sanders for his socialist beliefs.
This is also a safe space for leftists, and leftists are often most frustrated with modern "liberals" as you know them (i.e. Democrats, Blairite Labour, etc) because while they should ostensibly be allies in many situations, they are often the biggest obstacle in our way, demanding we stand down and acquiesce to capitalist policies, and talk down to us smugly and condescendingly.
We already all know we detest fascists and "conservatives" and Republicans. We vent about them too. But "liberals" often get our ire in our spaces because of the above.
That doesn't mean we work toward conservative goals.