Public commentary After leaving the DA, van Onselen redoubled his public commentary, both in a weekly column for the
Business Day and in his
liberalism-focused blog,
Inside Politics. He also worked briefly as a journalist for the
Sunday Times.''' Journalist
Peter Bruce described him as "a huge and deliciously aggressive intellect". Others criticise him for rigidly promoting a narrow liberalism which neglects
social justice; Max du Preez has denigrated him as "the self-styled guardian of DA liberalism" and
Pierre de Vos has written blogs criticising both his "self-righteousness" and his "hypocrisy".
Alleged pro-DA bias Van Onselen's columns led him into confrontations with the opposition
Economic Freedom Fighters, as well as with the governing
African National Congress (ANC). ANC-aligned critics tended to question his impartiality due to his association with the DA: he was accused of continuing to pursue the DA's "insatiable anti-ANC obsession" and of being a partisan "masquerading as a journalist". These accusations emerged primarily in response to van Onselen's sustained public criticism of
Mmusi Maimane, who at the time was Zille's heir-apparent as DA federal leader. Perhaps most famously, in 2013 van Onselen wrote one column which attacked Maimane for his "illiberal" views on African identity, and another which compared Maimane to the protagonists of the
T. S. Eliot's
The Hollow Men. In 2014 the DA, accusing him of becoming his own party's harshest public critic, described van Onselen as "pushing the same
factional agenda" that he had pushed inside the DA and that had resulted in his resignation from the party. During the same period, responding to the ANC's complaints that van Onselen was a DA media plant, Zille
Tweeted that van Onselen was in fact "a proxy for a faction in the DA". Zille claimed that van Onselen had "turned his guns" on Maimane in defence of Lindiwe Mazibuko, who was expected to be Maimane's main opponent in the leadership race. This led to another series of ripostes in the media, culminating in a particularly hostile op-ed by Davis, who accused van Onselen of having been an unprofessional and divisive communications director and described him as "an embittered former party hack".
Institute of Race Relations On 22 January 2018, van Onselen joined the
South African Institute of Race Relations (SAIRR) as head of politics and governance, in which capacity he oversaw SAIRR's political analysis and commentary on current affairs. Van Onselen led SAIRR's
voter opinion polling ahead of the
May 2019 general election. However, he left SAIRR later in 2019, and, in October that year, he published a column entitled "How the DA and IRR are creating a
race war". it contained scathing criticism of SAIRR's new "Save the Opposition" campaign, which van Onselen described as a thinly veiled attempt "to influence the DA".
Victory Research In 2019, van Onselen became chief executive officer at Victory Research, a
market research consultancy founded by DA staffer Johan van der Berg. The firm rose to prominence in the run-up to the
May 2024 general election, when van Onselen's team at Victory was commissioned to conduct opinion polling for the Social Research Foundation, a think-tank led by former SAIRR head Frans Cronje. Critics, led by
ActionSA and its chairperson
Michael Beaumont, questioned the credibility of Victory's polls, arguing that the company had a
conflict of interest in virtue not only of van Onselen's history with the DA but also of the fact that van der Berg, Victory's managing partner, remained the DA's head of research. Van Onselen dismissed the allegations in an interview with the
Financial Mail, saying that van der Berg had no role in Victory's daily operations. In the aftermath of the election, his polling was hailed for its accuracy. == Personal life ==