basically they accuse some left people to have been (too) tolerant with muslim people in the name of multiculturalism, leading to being laxist toward ideologies and cultural practices (such as islamic preachers in some mosques) that lead to / encourage to terrorism (a lot of the terror attacks we had came from people visiting the same mosques..).
it's not completely unfounded if you know some french left-wing poiticians
To me it sounds like the new liberalism couldn't be farther from the classical libertarian / liberal values, that's why it's sad when that word is used.
agreed, libtard/baizuo are typically anti-liberal control freaks who have undermined the classical liberal base by giving conservatives something they can (incorrectly) associate with liberalism and make simple jokes about.
https://pbs.twimg.com/media/EZzv5O6UYAA4cb6.jpg
(I'm not Chinese nor do i speak it)