Because chasers undermine the expressed gender identity of trans individuals for the sake of their own sexual pleasure. Calling it "transphilic" is just semantical wordplay that dismisses the inherently predatory nature of chasers.
How is it undermining that and not affirming? I mean to fetishise a group is wrong, I get that and that is also my opinion but if they want to fuck a transwoman they want that because she is a woman which affirms the womanhood?
And the point is how is it transhate if you like the trans aspect specifically. Doesn't make sense to me.
It is not a wordplay it is what those words mean. Phobic means something like hate or fear and phile means something like love or attraction.
Edit: as phobic means you want to get away from something or don't want it to exist. Fetishising is the exact opposite.
If someone is arachnophobic that doesn't mean he wants to fuck a spider or undermine the identity of the spider. That someone wants the spider be gone because it is a spider.
Did you read the original reddit thread? Chasers are dangerous to the trans community. It isn't about being attracted to trans individuals, it's about specifically seeking them out for being trans and fetishizing them being trans.
Can you not see how this may look if you are the trans person in this relationship?
I wrote a lot more than 1 sentence in the beginning and linked a good thread with a bunch of trans individuals discussing said topic. They aren't adding anything, just playing semantics with philic vs phobic.