Men's Group

Men are the penultimate evil, the source of all oppression and essentially everything that is wrong with the Universe.

Women are to be protected and separated from the evil male, preferably with their own planet or something.

The paranoia around MTF transsexuals plays into the bizarre conspiracy theories around something called "The Patriarchy". Part of the evil patriarchal plot against womynspace is to have men surgically remove their genitalia (sure, why not) and become women so that "The Patriarchy" can invade sacred holy protected womynspace with their evil stinky stealth male-ness.

There is also hate reserved for FTM transsexuals, altough it's worth noting it's a different stripe and not quite as vehement or paranoid. The hate for FTM transpeople like Chaz Bono is more of the "traitor!!!" variety: See, men are evil and stinky (see above) and as such wanting to BECOME one is becoming the evil oppressor and identifying with that which should be stricken from the Cosmos.