Why has there been an uprise in right wing politics in the last 15 years?

Historically people who would never have gotten into postions of power such as Trump and Johnson to name a couple but have done in recent times. Is this down to a simple changing of the times where society is more accepting of language that historically woudnt be tolerated as presedential matierial. Such as Donald Trump accusing Obama of not having a US passport, something he knew wasn't true when it came out of Trumps mouth but he felt the need to because in his worbed mind and a section of his followers would undermine the legitmatcy of Obamas Presidency.

Why has there been an uprise in right wing politics in the last 15 years?
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