If you don't have evidence of crimes, you can't convict.
I don't think this is a criminal matter really. Fighting for the enemy is not a "crime", although it may be on the books as such. They are simply an enemy in war, to be dealt with as an enemy. And no, they don't get a POW camp, because there is no reciprocation, and because it's impossible to ever have a negotiated end to the war. (Even if one jihad group voluntarily disbanded many others could still exist to join.)
If all you know is that a person took a flight to Eastern Turkey and then went off radar for a year and a half, and posted some offensive shit on twitter before they left that can be construed as supporting ISIS, you can try a hate speech trial over those posts, but that's about it. As it should be. It's called "burden of proof", you can google it. If you want to live in a country that punishes people on the mere suspicion that they committed a crime, there's unfortunately plenty of places on this planet you can choose from!
How about pictures of them with isis units? How about videos of them doing isis propaganda? How about intelligence evidence that they were a known fighter on the ground?
Of course you need some sort of standard of evidence, or innocent people could easily be killed. But fighting enemies in war, you use a different standard to a criminal court quite likely.
I'm not ready to surrender Europe to those who want to turn it into a shithole.
You see for me, keeping enemy fighters
out of the country, is a good thing. But you seem to want to let the enemy fighters back in, or you have a "shithole country"...
How is that completely different? The main instigator was hanged, as was the costumary in those days. But the brigade he created, though not the success he had hoped, had several dozen members over the years. Some of them died in battle, some of them came home without being tried due to insufficient evidence, some of them received much lighter sentences than he did.
Well if people received lighter sentences after fighting for the enemy, then yes, that's a different thing. But my position would be, if you fight for the enemy, that's simply the end of you ever being allowed back into the country, with the exception of taking them back to face the death penalty. If you could show something like they were forced into it, or they were under 18, then that may be different.
If there's evidence of criminal activity, you can put him in jail.
You don't want an *enemy in war* in prison. That's completely the wrong place for them. They aren't a criminal. A criminal is someone who e.g. robs banks, not someone who takes up the opposite side in a war. It's simply a category mistake to be treating them as needing to be sent to prison, even if laws exist to do that.
As with any other crime, you don't get to incarcerate people, least of all your own citizens because they might become a danger in the future.
Good that we don't need to worry about that issue then. We don't need to take action against them because they *might* be a threat. We can simply deal with them as an enemy in war and a traitor, regardless of whether they are a threat. Of course I think they *are* a continued threat but that's a different matter.
Basically, you are going to let them come home to live next door to citizens, after maybe getting a few years in prison, if there is even the evidence to justify that.
And I think that is way off when you are dealing with enemy fighters.
It is exactly the same. Care to explicate one relevant way in which they're different?
So then-- you simply don't believe that "integration" is required at all. They would be free to encourage even the most conservative forms of Islam, and they can openly say that they will not integrate with Western values. You would presumably say that they should follow the law, but ignoring that detail, you would allow their subculture to go completely against the idea of integration. That's pretty much what I suspect of liberals. You will not stop them from coming in. And you will not expect them to integrate. It's just a recipe for a divided society.
If you can't see the difference between, say, the Liberal Democracts in the UK wanting to change the voting system to proportional representation, and some people from (largely) immigrant communities wanting a complete replacement of your system with their own immigrant system, then it's just... well are you blind to this? One type of change is coming from the inside and is normal political development. The other kind of wanted change is from migrants who are completely refusing to integrate. It's an outside culture. I can only guess that you don't see any difference, because you just don't think immigrants should have to integrate in the first place.
The other thing I can say, is that Islamism is brutally oppressive. So they would be coming in, and trying to oppress the natives with their own system.
If an immigrant comes in and says, "I want to make you my slaves" (not exactly the same as Islamism but not too far off), that's just not the same thing as the Lib Dems wanting a different type of voting system!