There's nothing inherent about Black radical politics that causes transphobia, misogyny, or anti-Indigenous racism.
Kind of the opposite. When you adjust for age and intersecting oppression, you'd expect that radicals are going to be more likely to be allies on other issues.
But people sometimes fail to live up to their ideals and end up defending institutions of power where they're personally in a position to benefit from those systems.
Especially when there's trauma involved.