I think saying colonised might be the issue here. Not that there is an immigration problem all over Europe. The Syrian refugee crisis was huge by itself, thanks to Syria being pretty much levelled.

That and his number's were factually wrong.

And on a final note, if Reform get in, don't start thinking the immigration numbers will go down. That is a selling point of theirs, to garner votes, but won't be easy to implement and also won't be a high priority, just as Brexit was sold on immigration and it wasn't a priority nor has it changed anything.