Either the photon gets completely through or it does not get through at all. There is no way the photon can spilt into two parts one of which makes it and another that does not. Thus in the angle of the polarizer determines the probability that the photon will traverse the polarizer. Further if the photon does traverse the polarizer its polarization will be exactly aligned with the polarizer. Now consider a particle that decays into two photons.
Conservation laws require that the polarizations of the two particles be exactly correlated.
Quantum mechanics requires that the particles do not have a polarization value until they are observed. This seems very strange. Something that cannot exist in either particle is exactly aligned between them. It gets stranger. Before either particle is observed we have no idea what the polarization is.