Are you going to hug "every" immigrants that you see? How will you be categorizing them as immigrants? I guess you mean the "visible" ones, the woman wearing headscarves or for males the ones with long beards. The Polish immigrant living in Berlin will be hard to locate to hug! 

Good luck on your trip, I will be praying for your safety, rule number one, you do not touch a Muslim woman that you do not know very well. 

PS: We are not talking about North America attacks in this article, it is about Europe, which as has had its fair share of massacres.