According to what you quoted there were 4 Syrians and 1 American in the "31 people had been identified as being involved in the violence". 4:1 is hardly a "vast majority" - and there were two Germans as well.
What are you talking about? This isn't just about Syrians vs Americans.
You aren't addressing what I actually said:
The vast majority of the problem (it seems) was created by recent refugees/illegals from North Africa and the Middle East. So I would focus on that rather than Western nations.
That's because you have inbuilt prejudice against Muslims and Arabs. I wonder why?
Well in this case, the problem is mostly coming from Muslim nations like Algeria and Morocco and some others. We don't know the religion of the American apparently involved.
But yeah, as it's mostly a problem coming from North Africa and the Middle East, (illegals/refugees), I think it's fair to focus on North Africa and the Middle East.
If you stopped all Americans coming, you would lose tourist money etc. Stopping illegals doesn't have that problem. Of course if the American in question was an illegal immigrant (it's possible) then by all means stop American illegals also.
The Cologne issue was mostly about the alleged sexual assaults as you acknowledge. You are being obtuse to deny the fact, that no asylum seekers were involved in sexual assaults, is not significant.
Again: it's completely dishonest of you to try to blame me for not quoting one sentence, when I didn't need to quote that sentence to refute you, and it doesn't change the fact that your statement was misleading. Sexual assaults may be important to the story, but they weren't the only part of the story, and they weren't what you yourself mentioned. You can't just pick out a random sentence from the article and blame me for not quoting it!
Also...
"Among 32 suspects identified as of Friday night, he said, were 22 people registered as asylum seekers, revising an earlier figure of 18. The identified suspects included 17 people from Algeria and Morocco, as well as three Germans and one U.S. citizen.
another 44 suspected assailants hadn’t been identified, he said."
http://www.wsj.com/articles/germany-says-asylum-seekers-among-suspects-in-cologne-new-years-eve-assaults-1452253734
So a lot of people haven't been identified. We don't know if they are asylum seekers or not or what they are accused of doing.
And also:
"A 26-year-old Algerian man has become the first person arrested in connection with a string of sexual assaults during New Year’s Eve celebrations in Cologne that sparked a debate about Germany’s ability to integrate migrants.
Prosecutors said on Monday the unidentified asylum seeker had been arrested at a refugee home in the nearby town of Kerpen over the weekend. He is accused of groping a woman and robbing her phone, the prosecutor’s office spokesma,n Ulrich Bremer, told the Associated Press."
http://www.theguardian.com/world/2016/jan/18/cologne-attacks-algerian-asylum-seeker-arrested-new-years-eve-assaults