Does an increasing migrant presence contribute to political radicalization of societies?

I would argue that political radicalization is already present in a society even before there is evidence of an increasing migrant presence; after all, norms are built in from childhood and it's difficult to rid people of such radicalization later in life. Of course, if someone experiences something negative because of migrant presence, they may become more radicalized in their thinking, but that's simply a case of the radical views then coming to light; it doesn't mean it wasn't always there. With increasing migrant presence, people are simply becoming more vocal about their opinions as there seems to be more support for them (e.g. UKIP), which gives those with radical opinions a platform. Coupled with the media, this may then lead to increased political radicalization as individuals that may not have even considered the effects of immigration may then become aware of negative tropes associated with it and, consequently, become radical in their thoughts, voting habits, and even how they act towards other people. It's like a line of dominos, with each triggering another.