Unfortunately some people are using her death for political gain. I think that is the point that Phil is making? The likes of the Guardian were busy circle jerking themselves into a frenzy in excitement of the Remain propaganda opportunities before she was even dead. Some are using it as opportunity to demand the referendum is cancelled. An EU minister suggested this is what happens when you don't want unity with the EU.
From what I have seen in the media, they're generally glossing over the fact he was known to be mentally ill/unstable and concentrating on his Brexit and Far right links (because everyone wanting Out must be far right). As much as I dislike the hatred preached by the likes of Britain First, I can see government using this event to implement more draconian laws on those questioning certain policies. They've not even confirmed he shouted "Britain First", they are now suggesting he shouted "Put Britain First" which is a world of difference.
It is terrible that she lost her life and it is so senseless. However with politics becoming increasingly poisonous and abusive, I expect more incidents in the future. The Remainers declare that those wanting out are thick racist thugs, the Outers declare that those wanting to Remain are traitors to the UK. The EU debate hasn't been a debate, it has been a series of events where opposing sides hurl their views and abuse at each other with neither even intending to consider their position. On social media you see idle threats from each side, people threatening to 'unfriend' or 'out' those with opposing views - what the hell happened to accepting differing points of view?
I'm not a fan of Breitbart, they're the right wing equivalent of the Guardian. However this piece is quite good and highlights what is going on.
Project Grief: Remain's Dirty Politicking Has Hit an All-Time Low
Neither side is innocent in this campaign. Both have stirred and encouraged hatred.