"So basically it is a made up word not at all in keeping with the traditional usage of the word phobia."
- Yes well done, you've figured out the great secret. Words are made up. All. of. them. All of the time.
We have agreed definitions and meanings change with usage. But this is english, not the latin/greek which we draw on for some root words.
"Why is your opinion any more valid than those who disagree with transgender people? Or turn it around. Why do you get to tell people they shouldn't be violent?"
Everyone. Everyone gets to tell everyone what their opinion is. We don't have to listen. But it turns out that listening to only the most powerful people leads to social practices which hurt others. If we want to live in a compassionate society then we should listen to minority voices. Those which have not got the (largely white, male, wealthy, educated, hetro-sexual, cis-gendered) media speaking for them already - voicing their concerns (whether that is about taxs, gun control or abortion). If we want to live with our fellow neighbours in a compassionate society we should listen to them, and then decide whether their opinions are valid.
You don't have to follow their opinion, but when they say 'this thing you are doing hurts me' - whether feminist, person of colour, transgender, homosexual, or any other minority - you have the choice of ignoring that hurt - because you're a powerful majority who doesn't have to give a shit - and taking it into consideration.
That's up to you, whether you want to be an asshole or not.
And if you're wealthy (as i presume you are, because you're able to spend time on the internet...) then you've no excuse for not educating yoruself. It is your choice to be ignorant, and hurt other people.
It all comes down to the kind of world you want to live in; and i'm pretty sure even you can understand this much. If you want to be a troll, you can, but we're entitled to fucking hate you and ignore you for it...