I'd like to know why Fleurista is making that claim too. And also on what basis Fleurista believes it's fair and accurate to say that GC are guilty of

grouping all trans people together as being the same.

My perception is that GC are the one group that does the total opposite. GC constantly point out that "all trans people" are NOT the same and therefore should not be lumped together.

GC point out that "trans people" are either male or female, and there is a world of difference between trans people who are male and trans people who are female. GC also point out that the "gender affirming" medical treatments given to males and females who ID as trans have very different impacts on the mental health and mental wellbeing two groups, in large part because of the innumerable physical differences between the two sexes.

GC also point out that that males and females who identity as trans need to be further distinguished from one another not just by their sex, but by their age and the year/era they were born in; by the age and stage of development they were in when they first began to experience distress about sex and gender and an inclination to "identify as" the opposite; by their sexual orientation (when applicable); and by the range of experiences they went through growing up, with special attention to ACEs like child sex abuse, parental divorce, family conflict, bereavement, etc.

GC is the group that points out that girls whose distress over sex and gender and desire to be a boy/man suddenly crops up during puberty of adolescence are totally different to boys who felt a desire to be girls starting in early childhood long before puberty of adolescence - and that these two very distinct groups are vastly different in turn to the legions of males who develop "gender dysphoria" and decide to declare that they are girls/women in adolescence or adulthood principally because doing so brings them enormous male sexual pleasure.

GC are the ones who not only distinguish between two groups of adult and adolescent males who identity as trans like Blanchard did - the homosexual ones and the heterosexual ones with autogynephilia - we say that even amongst these two groups of males there are often marked differences in what is driving them to identity as the opposite sex, which have a lot to do with culture, ethnicity, and where they were born and grew up. GC point out that even within these two groups of adolescent and adult males, there are differences in the benefits, pleasures and seeming solutions to their overall life problems that identifying as girls/women brings them - and differences in the drawbacks and difficulties they experience from devoting their energies and time in, and investing so much of themselves in, the massive undertaking of trying to "live as" and "pass as" women/girls too.

GC is the group that further point out that just as "trans people" shouldn't be lumped together as if they were all one and the same, youngsters shouldn't be lumped together by use of such difference-erasing neologisms as "trans children" and "trans youth." GC are the group that keep pointing out that even when the "gender affirming treatment" prescribed, championed and sold as a panacea and magic cure for all "trans children" is the exact same thing - GnRH analogs aka "puberty blockers" - and it's administered at the same exact age, the treatment has radically different effects on male youngsters versus female youngsters. GC point out that when female children are put on "puberty blockers" for sex and gender distress, the blockers do not lead to improved body image, greater self-acceptance and less anxiety and depression. On the contrary, "puberty blockers" in gender and sex distressed females leads to a worsening of mental health in these specific regards - and to an increase in desire to/thoughts of self-harm, including suicide. Moreover, in females the use of GnRH analogs to block puberty results in permanently stunted height and dangerously low bone density, which in many cases results bone fractures, spinal deformity and degeneration, skeletons that cannot support the girls' bodies, and constant pain.

Seems to me that if anyone is guilty of "grouping all trans people together," it's not GC - rather, it's QT, TRAs, the legions of people who work in the gender vendor industry, and a great many individuals who identify as trans and mistakenly assume that others who identify as trans must be very much like themselves. IIRC, on this very sub Fleurista and other individual posters who call themselves "trans people" have been taken to task rather often by GC posters such as yours truly for not seeming to be aware of, or not paying enough heed to, the fact that many "trans people" are female, and for appearing not to take into account that the life experiences of many "trans people" are drastically different to their own personal life experience and the personal life experience of the small number of other "trans people" they personally know or know about too.