No conspiracy, just advanced stages of Liberalism and political correctness.
Whole generations are growing up being educated that everyone is equal, everyone has a right to whatever they want and the world would be a better place if people are allow to live where they like and sex with anyone they want to have sex with.
These younger people do not have the ability to see beyond a black and white approach they have been taught with liberalism and political correctness. Anyone who supported Brexit to leave the EU were racist, why was that? To these people just doing something which impacts on another persons life is wrong. Therefore denying anyone in the EU a right to move to the UK is racist, which is something that will happen eventually after leaving the EU.
These people are deluded into thinking that what they are thinking is mainstream and anyone who is a decent person will embrace this idealogoly. They were shocked at the results as they could not imagine the majority were racist bigots. Of course that is not the case, but the logic they live with prevented them from seeing that border control is not racist.
Border control; another issue to arise with Trump and yet again we see accusations of racism and anyone supporting Trump is racist.
It is not a conspiracy, it is a fact that decades of liberalism and political correctness are shaping the angry minority who were fooled into thinking that everyone else thought the same as them. Upon finding this out they now take to the streets to tell the rest of the population how they are all racist bigots.