Ignorance is Bliss

I found this quote on a mission statement for a "progressive" web sight:

We demand our members to show complete intolerance for oppression, bigotry, ignorance, violence, corruption, and exploitation. We may choose to deny membership to individuals who support certain politicians; for example, George W. Bush.

Maybe I am wrong, but by denying membership to someone whose ideology is different than yours a form of bigotry and ignorance?