Ministers have unveiled a new extremism definition under which certain groups will be blocked from government funding and meeting officials.
It will apply to, but not criminalise, groups that promote an ideology based on "violence, hatred or intolerance".
Communities Secretary Michael Gove said a surge in extremism since the Israel-Gaza war posed "a real risk" to the UK.
Civil liberties advocates, community groups and MPs have criticised recent government rhetoric on extremism.
TalkTV's Ian Collins clashes with Imam and broadcaster Ajmal Masroor over the definitions of extremism and whether Michael Gove is a right-wing politician.
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