In a new pledge to promote "core British values," the Prime Minister said that opponents of democracy, equality and tolerance have been allowed to flourish.
In recent years we have been in danger of sending out a worrying message: that if you don't want to believe in democracy, that's fine; that if equality isn't your bag, don't worry about it; that if you're completely intolerant of others, we will still tolerate you.
This has not just led to division, it has also allowed extremism - of both the violent and non-violent kind - to flourish.
We need to be far more muscular in promoting British values and the institutions that uphold them.
A genuinely liberal country believes in certain values, actively promotes them and says to its citizens: this is what defines us as a society.
More top news
President Obama has declared a state of emergency in South Carolina after severe storms caused heavy flooding.
The last British prisoner in Guantanamo Bay is worried he will die before US authorities release him.
Proposal would see a task force set up to assess environmental impact from breaches of emissions testing rules.