When Bernie starts saying shit like this my opinion of him will change:
"You don't know how happy I am today. For the first time in the history of this country, we've managed to put a communist on the Supreme Court, a comrade of the quality of Flávio Dino"
Those south american socdems hit different.
Under no circumstances would any of our global north socdems say something overtly praising putting communists in positions of power. With perhaps the sole exception of Jeremy Corbyn who was quite obviously only a socdem of necessity, it's clearly not his actual ideology.