I have a problem with calling trans women radical feminist. Radical feminist are all transphobic and very much specifically transmisogynist, so I think calling a trans woman a "radical feminist" is just wild. A real radfem would never accept her. Hating men is not what makes you a radical feminist. Real supposed "TIRFS" still exclude trans women and erase the identity of trans men or otherwise afab trans people, calling us women and female.
I mean, trans women are calling themselves radical feminists. There is literally a book by a popular transfem writer (Talia Bhatt) called Trans/Rad/Fem, which is explicitly about reclaiming radical feminism for trans women, and won the 2025 Transfeminine Review Reader’s Choice Award, and according to the Wikipedia page "was also called "the single most popular work of transfeminist theory since … 2007" and won the vote in the largest blowout in the history of The Transfeminine Review."
And this is not for no reason! They practice a form of feminism that, sometimes unintentionally and sometimes intentionally, is very much in the family tree of radical feminism. Radical feminism is not just "trans women are evil males." And to be honest, trans women - even ones I strongly disagree with - do not need cis women's permission to do feminism in any particular wary and I do not think most T(I)RFs actually give a shit if TERFs accept them. Many, like Bhatt, feel that they understand radical feminism theory from its origins better than TERFs and that transfeminism is a natural extension of radical feminism, and this is also not for no reason although it is a lot more complicated than that.
Most trans radfems also don't call outright call trans men or nonbinary people seen as female "women" or "female." Its complicated but most that I've seen do the opposite, arguing that trans men occupy the sociopolitical position of "men" in the same way cis men do in traditional feminist theory, which is also part of the "reclaiming radfeminism" thing. Again, all around I'd say its more complicated than that; see this post also.
But like, that there are trans people who are radical feminists is not really up for debate to me. Many already self-identify that way! & its complicated because like, I agree that much of radical feminism does carry some deeply ingrained cissexism, but I think people too often go from "radical feminism's cissexism isn't something that goes away once you use people's preferred pronouns, it exists on a deeper ideological level" with "it is impossible for a radical feminist to be trans-inclusive because its bad for trans people!" which. Feels like a reverse No True Scotsman to me. Its like saying "radical feminism isn't real feminism because its bad for women"; there is no Pure Untainted Feminism and there is a good reason to call bad forms of feminism, feminism (see Sophie Lewis' great book Enemy Feminisms).
Whether you use TIRF or TRF (transradfem), the point is to describe a form of radical feminism that takes the stance that transness is real and natural and trans people (at least some of them) should be included as feminist subjects in some way. Its not "radical feminism that includes every trans person," it is radical feminism from a (particular) trans perspective, and so vulnerable to all the same flaws and mistakes as radical feminism from a cis perspective.
My point being that trans radical feminists are called radical feminists because they say radical feminists things and many do this very purposefully because they consider themselves radical feminists. You are right that being a radical feminist isn't just about hating men, but it's also not just about hating trans people, or really just about any one thing, anymore than any ideology can be reduced to any one belief.