After the London Bridge attack, this poster is doing rounds all over social media. David Vance, someone frequent on Twitter, shared the poster too saying 'not all immigration is equal'. The pic shows on one side attacker Usman who grew up in Pakistan and went about stabbing people before he was killed. But the other pic is of Neil Basu, an Indian origin man who led the anti-terror operation. His father is said to be from Kolkata in India.