The Home Office does not hold centrally the information requested.
The Home Office collects and publishes data on the number of arrests for notifiable offences on a financial year basis, however, specific details about the offence are not collected so it is not possible to separately identify those made as a result of a speech.
Data on the number of arrests, by offence group, are published in the ‘Police Powers and Procedures, England and Wales’ statistical bulletin, which can be accessed here: https://www.gov.uk/government/collections/police-powers-and-procedures-england-and-wales
The Home Office does not hold information on the political affiliation or religious beliefs of those arrested.
Information on prosecutions and convictions is the responsibility of the Ministry of Justice.