well, think of it in terms of this statistic

16 transgender people have been unlawfully killed this year, according to this. That's not a complete list, and I think that the amount of trans men on the list in general is underrepresented. Still, however, it is notable that as yet, all of the trans murders this year are women save Brian / Bri Golec, whose identifiers are unclear but appears to have been identifying as an androgynous pansexual man.

So an intersectionality is that All trans people have a higher likelihood of murder than the average person, but Trans women have a higher risk (in as much as it's supported by our statistics - it may be that trans men are underrepresented) of murder. Their experiences are different within the experience of being trans

It's also notable that at least 12 of those women murdered are women of colour. Trans women all have a higher likelihood of murder than the average person, but Trans women of colour are more likely to be murdered. their experiences are different again from white trans women.

That's intersectionality, as I understand it, in a nutshell, and it's a problem because of the broad "Gentrification" of the LGBT movement, and the Feminist movement (and really almost all movements) - lots of white gay men don't want to talk about the black trans women on the streets, lots of white feminists don't want to talk about the overrepresentation of trans women of colour in homelessness, or in sex work, or even the general overrepresentation of GSM kids on the street.