Complex sentence: Both in Britain and on a visit to Germany he photographed both pro-fascist and anti-fascist propaganda and graffiti, and like many leftists at the time, he believed that fascism was a temporary, extreme expression of capitalist society that would soon be overcome by socialism.
Split into simpler sentences: Both in Britain and on a visit to Germany he photographed both pro-fascist and anti-fascist propaganda and graffiti. Like many leftists at the time, he believed that fascism was a temporary, extreme expression of capitalist society that would soon be overcome by socialism.