I’m not stupid, I know it means “fear of.” Do you think Homophobes are “afraid” of gay people? What abiut transphobes? In the context of bigotry, phobia is used to refer to invalidating or undermining ones sexuality, gender identity, etc.
Literally talk to a trans person, or just read through that thread, it isn’t difficult.
Talk to trans people about how they feel about lumping anti-trans views into the “transphile” category because rather than being hated outright, chasers simply prey on trans individuals and undermine their gender identity in a sickeningly fetishizing way.
Just touch grass.