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Never forget this week.

Not just because of the tragedy in Brussels , but because it will go down in history as the week when staying in the EU became infinitely more dangerous than getting out.

Because after 32 innocents were murdered by Islamic State bombs in Belgium, it’s become ­terrifyingly clear the police and the intelligence services there have no clue what they’re doing.

Also, we’re told that between 400 and 600 ISIS jihadists trained in Syria and Iraq are now moving freely around Europe plotting their next atrocity – which is likely to be in Britain.

More significantly, Sir Richard Dearlove, the former head of MI6, says we have a better chance of protecting Britain from terrorism if we’re outside the EU rather than in it.

He says our borders could be strengthened and extremists could more easily be captured or kicked out.

He’s not alone. Ronald Noble, ex-head of Interpol, describes the EU’s border policy as like hanging a sign welcoming terrorists to Europe.

And when these men speak we have to listen.

Read more:UK city which 'Paris and Brussels attacker staked out before massacres'

Because they know a damn sight more than David Cameron and his Remain ministers who are wrong to try to terrify us by claiming staying in the EU is essential for our security.

It’s simply not true the union has kept the peace in Europe. That theory has been blown out of the water by the EU’s refusal to share intelligence.

Because of that Britain was left horribly exposed as Belgium was warned last year about one of this week’s bombers but failed to register him on the EU terror list, leaving him free to roam Europe.

(Image: Reuters)

Sir Richard says Britain is Europe’s leader in matters of intelligence and we “give much more than we get in return.”

So, far from being isolated if we leave, we’ll ­actually be safer – for the simple reason our spooks are better than the EU’s.

And just imagine if we vote Out, the only human rights we’ll have to bother about are those of law-abiding British people.

We’ll be able to deport who we like and stop those we don’t want coming in. And the human rights of jihadists won’t matter one jot.

And all those idiots screaming that talk of Brexit in the wake of Brussels was making political capital out of tragedy are talking tosh.

(Image: Rex)

Because if this week isn’t the time to talk about our security – when the hell is? When Britain has been bombed?

When 30, 50 or 100 men, women and children are lying dead on our streets? Of course we’re going to talk about our security now. We’d be fools not to.

And it’s our security that has to make us forget this la-la-land dream of Europe, the one where we’re all one nation, one people, having lovely holidays, eating each other’s cheeses, celebrating each other’s cultures.

We have to forget freedom of movement and common foreign security policies.

Forget the ideal where people were supposed to find security not through money but through a connection with each other and a respect for human rights.

(Image: Getty)

Because as lovely as that dream was, it’s dead now. And ISIS killed it.

And if border-free Schengen isn’t dead yet, it needs to be. Because how much more proof do we need that the free movement of people is now helping ISIS in its global war?

Just look at Europe if you don’t believe the dream is dead.

Two of its capital cities have been torn apart by terror attacks.

Sex and violent crimes by migrants, fuelled by a clash of cultures, are soaring. German prisons are bursting with 30,000 migrants.

Poland is now refusing to take the 7,000 refugees it agreed to in case there are terrorists among them.

(And at least one of the Paris bombers got into France as an asylum seeker.)

And in Turkey eight terrorists posing as refugees were arrested.

We have one last chance to keep Britain safe and to reclaim our borders. Which is why we need to get the hell out the EU – while we can!

A European Rights Commission this week told British ministers they can no longer use the term “ illegal immigrants ”. Instead, when they talk of foreigners coming here without permission, they must say “irregular migrants”. So they can break our laws but we must still treat illegals with respect so as not to hurt their feelings. Yet another reason – if we needed one – to get out of the EU.