I'm gonna call bullshit on this one. Being nasty online is poor behaviour but it isn't a cause for prison; especially when the threats are entirely idle with no option of being carried out (like in this case).
By itself, this news story is no big deal, but in the space of a couple of weeks the UK government has:
A)Decided it can ignore agreed civil rights law for its own desires
Made it a criminal offense to talk bollocks over the internet
C)Decided to make it an imprisonable offense to wear a tshirt promoting a group the government doesn't like
All this is done under the usual catch-all excuse of "safety", which is just a quick get out to sideline any dissenting voice as some lunatic fringe who must be promoting active endagerment.
Just take a couple of minutes to think about what powers the above has granted the government when it comes to silencing those who don't agree with them. Then think about whether you might one day disagree with the status quo....