KiNgBrAdLeY7: Copy Russia, problem solved. Russia is full of minorities, people from other ethnicity and even, trouble-makers of terrorist levels.
First, ban NGOs, especially those who refuse to be checked in thoroughly and monitored at all times.
Second, announce their owner "persona non grata", like George Sorros, *cough*.
Third, LEGALLY prevent snowflakes and SJWs from preaching, converting and recruiting at public places, especially schools and deem their using of children as audience illegal, more appropriately, penal, or punishable by law.
Fourth, answer accordingly to any act of violence, especially threat to the nation or the state's civil functions and have the law applied over each and every case, with decisiveness and force.
Fifth and most important, well developed, exceptionally well trained, "anti-terrorist division". Russian one is one of the top orgs the world all over, right after Israeli one.
Law of the softies: If you play soft and others take you for a deranged, conceited idiot, they will keep disrespecting you and turning your place into foreigners' playground, or even worse, battleground. Here for example, Belgium and northern countries' employees taking care of refugees as their job, were called back to their place, because they are threatened physically; fires put from refugees, beating up of employees taking care of them and destruction of their property even, such as cars, offices and equipment, is a daily thing, now.
There are solutions, but first you have to be allowed to use them. Not let a bunch of wasted culture trash freaks on PAYROLL and AGENDA run your place and hound you in each and every step!
Everyone demonizes Russia because it still has unity, rich culture, ethnic integrity, resists globalization attempts and rejects culture/society-grinders! But they got it right and many people know it, hence the support, love and above all, RESPECT, which is always hard-earned, never gifted. Heck, there are even americans who respect and support Russia and this is saying much!
Also, the most important part:
1) UK has not escaped, actually. The diplomats are working their ass off, so as they can find legal ground to PREVENT BREXIT! They are working intently on it right now, as we speak. Also, big companies, especially overseas ones, are trying to blackmail political grounds and hold the (prospect of growing/waning) economy HOSTAGE, so as they can achieve the "desired" result.
2) US is inside an even worse turn of events. Sorros conspires with Liberal moneyholders to take action against a democratically elected politician and are already even linked with the rioters, who are on payroll from them. If they use their money indiscriminately in such sums like for Hilary's campaign (30 millions handed out at an instant just like that), especially if they use their shady NGO branches both for it and for recruiting members, then things would turn much nastier, fast...
Europe needs to import these people and everything will fix itself.