Bertrand, I don't have a plan as we are sadly at the mercy of our spineless government. If I had total power, I would:
Admit that there is a serious problem with violence and extremism within Islam which has existed since its inception.
Ban migration from all Islamic countries until we have the situation under control.
Deport anyone preaching hate or extremism. If they were born in the UK, lengthy prison sentences in solitary confinement with intense rehabilitation programs. It would be worth it to build special facilities at this point. I don't think people fully realise how big of an issue it is. The media refuse to report on it properly.
Stop letting OBVIOUSLY radicalised people back in after fighting for ISIS. The fact that this even happens shows how seriously damaged our government is.
Stop letting Saudi Arabia fund mosques in Britiain.
Stop letting Muslims take over entire areas. It's impossible for them to integrate, even if they want to.
There are a number of things that could be done.
Islam is an ancient Middle Eastern ideology which we imported to Europe for some bizzare reason.
Japan, China, South Korea and Hungary have pretty much completely rejected Islam and what do you know, they have zero issues with terror. Compare those countries to France, Sweden, Germany and England. It's almost as if there is a connection between a large Muslim population and terrorism and violent crime.
How does Europe benefit from Islam?