Au contraire.
My sis, the social worker, the bleeding heart liberal -- an, thus, the Willing Tool of the Megomaniacal Left -- simply refuses to address questions that conflict with her progressive faith. There is no silence. Instead, there is "I don't want to talk about that" or there is a change of subject or there is a counter-charge of the "Your side does it, too" nature.
But she will never, ever engage in a conversation that might challenge her liberal religion. She is impervious in that regard.
In that respect, I believe she employs the same defense mechanisms that most Willing Tools employ. Substantive conversations are simply not to be had with a liberal.
In a nutshell:
"I'm a good person" (and therefore worthy of salvation) "because I care".
THIS is why "I don't want to talk about it" when there is something that points out the worthlessness of my "advocacy based righteousness".