Especially when subject to leftist criticism will they suddenly swing hard right. Progressive liberals will take all sorts of quasi-socialist positions, as long as they are arguing with a reactionary under an overarching reactionary climate.
But as we saw with Obama and Clinton, they will easily swing right when offered the most tepid social democratic criticism, let alone fully Marxist ones, if they fall for the propaganda that claims neoliberalism is "adult politics," "reasonable," "centrist." The same people who protested Bush's wars and called for UHC in 2007 were defending Libya and Honduras and attacking UHC in 2016.
Liberals, progressive or reactionary, are consummate opportunists. They have to be, by necessity. If your average worker maintained a consistent set of values and historical vision, we would all be revolutionaries by now. Turning on a dime to talk out both sides your mouth is the only way to uphold a liberal political party's line. "Respectability politics" can only work if people disrespect historical continuity and their own good moral/class sense.
The same day they tell a white supremacist that the police are racist and corrupt and that we need strong social programs, they will tell a leftist that community self policing/armed self defense and serve the people campaigns are ridiculous. To them this hypocrisy is nuance, but to anyone with clear historical vision and class consciousness it's just hypocrisy and a clear sign of how a protofascist develops
