There seems to be quite a bit of confusion and ignorance floating about regarding the ACLU. Some of this will come as no surprise while other parts of this may be quite surprising. This excerpt is taken from wikipedia: ACLU

The ACLU can generally be described as promoting a social (though not economic) libertarian program. Over the years, the ACLU has consistently fought in the court system for a liberal
interpretation of the U.S. Constitution that
allows for as much individual liberty as possible. Among other positions, the ACLU:

• Supports the separation of church and state; under this mandate, the ACLU:
  • Opposes the government-sponsored display of religious symbols on public property;
  • Opposes official prayers, religious ceremonies, or “moments of silence” in public schools or schools funded with public
    money;
  • Supports the rights of public school students to pray on their own;
• Supports full First Amendment rights of the press, including school newspapers;
• Supports the legality of abortion on the basis of an implied right to privacy in the Fourth
  Amendment;
• Supports full civil rights for homosexuals, including government benefits for homosexual couples equal to those provided for
  heterosexual ones;
• Supports affirmative action;
• Supports the rights of defendants and suspects against unconstitutional
  police practices;
• Opposes the criminal prohibition of drugs, and supports the legalization of drugs such as heroin, cocaine and marijuana (ACLU’s Drug Policy);
• Opposes demonstration permits and other requirements for protests in public places

The ACLU has been noted for vigorously defending the right to express unpopular, controversial, and extremist opinions on both
the left and right. Some have expressed the view that the ACLU sometimes plays a role comparable to that played by public defenders, helping to ensure that even unpopular defendants receive
due process. Executive Director Anthony D. Romero, President Nadine Strossen,
and Legal Director Steven
Shapiro currently head the organization.