Liberals and friendship
A liberal friendship is a friendship on liberal terms, as in requiring acceptance, allowance or lack of criticism of liberal values. It is often the product of peer pressure. Someone in a liberal friendship can expect loss of the friendship if he dares to express dismay or disapproval of the liberal values.
A liberal friendship can occur wherever liberals apply peer pressure to spread their belief system. It can occur in college, in relationships, and in the workplace.
In contrast, conservatives virtually never require censorship or acceptance of conservative principles as a condition of friendship.
Criticism
It is human nature to naturally be friends with people who agree with you, so people are more likely to be friends with people who agree with them politically. But this trait is not any more likely to be found in a liberal than a conservative, and to suggest that liberals refuse to be friends with people who do not agree with them politically is unlikely.
