This post is also available in:
English 
Español (Spanish) 
Italiano (Italian) 
Deutsch (German) 
فارسی (Persian) 
Português (Portuguese (Brazil)) 
Русский (Russian)
Short answer
Just like with ISIS, there is a reasonable expectation of copycat terrorist acts in Europe inspired by Hamas.
Long answer
Given jihadist’s global reach and ideological fervor, it poses a potential threat to Europe. The process of radicalization, aided by tacit approval from certain Muslim communities and sympathizers in Europe, and Europe’s general unwillingness to confront radical Islam hiding under the guise of multiculturalism, could cause terror to spread even more in Europe.
