It is a correct assessment for many Muslims in western countries actually. Not the majority of course, but a significant and loud minority. Their actions are absolutely shameful and unhumane. If you live here, you would know what I am talking about.
Muslims are being ungrateful by spitting on these people for hosting them. Especially the refugees who do these vile actions, look you had to run all the way to Europe amongst non Muslims to be treated fairly and supported monetarily, while your fellow Muslims brothers in the regional countries are supporting different factions to destroy more of our countries and kill more of our people.
If this isn't being ungrateful, then what is?