''The mood among Londoners I talk to ... is one of puzzlement for the attacker and sadness for the police officer who was killed. People are puzzled because the attacker was not the stereotypical migrant who was born and radicalised overseas and then moved to the UK.
''This attacker was born and bred in England. His mother lives in Wales. He didn't arrive here for a better life he had a better life, the UK life and yet somehow he was able to be converted to extreme views and actions.''
Dr Reti said there is also intense sadness for Mr Palmer.
''Despite thousands of people passing the House of Parliament every day there is some reverence and a hushing of crowd noise around where the flowers have been laid,'' he said.
The conference is sponsored by the Commonwealth Parliamentary Association and the opening sessions have a strong theme around national security.
After the terrorist attack security has been tightened up around the UK parliament and the decision was made late last week that the conference would proceed.