A coworker of mine is a man in his late 60's from the Democratic Republic of the Congo, now living in the United States. Only a year or two ago, he studied for his citizenship test, and was given official citizen status in the country. I don't think I had ever seen him as happy that day in the years I have known him, and he was very proud all week to tell everyone he is now an American citizen. This is clearly a man who grew up in one of the most undeveloped countries in Africa for most of his life, and through different political regimes, but was still more than happy to put effort into becoming an American citizen late in life, and values the opportunity to do so.

I know through my job, and through my social connections many people who are immigrants born from another country themselves, or are first generations to parents who were born in another country. Both cases have all assimilated just fine. Many might keep some tradition and cultural background, particularly those who came from Hispanic countries tend to still have a lot of their traditions in their home, but they still adopt "American culture" as their own.

I don't imagine Syrian refugees would be any different overall, but ostracizing a group of refugees in this way would make it more susceptible to problems. Instead of speaking against the unrest and lack of assimilation, nationals of countries hosting Syrian refugees could easily do their part in assisting with the process. If refugees move to your neighborhood, introduce yourself to them, assist them with basic things, and (if you are capable) offer things like clothes, toys (if there are children/families), blankets, or whatever else that may otherwise be donated/thrown away. I have yet to meet immigrants completely ungrateful for the kindness of others, and it could help to go a long way in improving their perception on being in your country.