@deBroglie @Strandjunker There are very clear examples like „no people of a certain skin color allowed in buses“ etc
But also more hidden exclusions like not providing ramps for people in wheelchairs so they won’t be able to enter the bus without forbidding it clearly. These are simple examples.
In a further step people would not only be excluded but also spread fear about them, like saying they are dangerous or they are a burden to society. This second step is much easier when you already excluded them first. Next add some conspiracy theories which brings a minority in connection with some not really defined evil power, make them somehow responsible for everything what is going wrong in the world.