In my opinion, it only depends about in where are you located at the moment, and where is the casino (online) located. If it doesn't have the proper license, you can easily bring back some lawyers and they will close the casino soon because it doesn't meat the regulations
If you found a casino (a physical) ones in your place or in your country then it's clear that your country supports gambling. They are giving license to operate to those who wants to run this business and the government will take a big portion on it. But with bitcoin gambling, it's different but you have the assurance that bitcoin gambling is legal since they are supporting gambling.