I REALLY don't understand how people are jumping to the conclusion I am PERMISSIVE of troon behaviour or indoctrination from saying 'I don't care about this person in particular'?

That's fine if you don't care about this one specific person, but you said "that's my universal line" meaning you're talking about the group.

They're not jumping to conclusions, they just took "universal line" as applying to "impose it on children" rather than "don't give a shit [about him in particular]". You can see how they'd read it that way since what for you intended they'd have to first infer the "about him in particular".

I REALLY don't understand how people are jumping to the conclusion I am PERMISSIVE of troon behaviour or indoctrination from saying 'I don't care about this person in particular'?

That's fine if you don't care about this one specific person, but you said "that's my universal line" meaning you're talking about the group.

They're not jumping to conclusions, they just took "universal line" as applying to "impose it on children" rather than "don't give a shit [about him in particular]". You can see how they'd read it that way since what for you intended they'd have to first imply the "about him in particular".