If you were to think of it from the other direction. Construct a list of (website) businesses not allowed to do business in israel, what would they be?
Illegal gambling (that may be all gambling, that may be gambling not under a state monopoly, I'm not sure).
Illegal weapons sales
People smuggling
Terrorism
Hostile state propaganda (Iranian news).
Child pornographers.
Etc.
They're aren't on the list because they're equivalent crimes, they're on the list because the government only has the authority to take the *one* action against them if they're based outside of the country: Ban them from domestic websites. And even that is of dubious capability.
Now the thing is, the Israeli government may not have a great problem with people smuggling, they may actually want people to see what the Iranian press is saying, they may have more effective border control on arms sales than blocking websites (since those are going to the palestinians who theoretically have their own internet anyway) and so on.
But Illegal gambling, child porn, they're both illegal. And the Israeli state can't do anything about them if it's hosted outside israel. And the Israeli user action is the problem (giving money to an unlicensed betting firm, acquiring/distributing child porn, or downloading copyrighted works without license), a casino in the US that takes israeli money is behaving legally for them, etc.
I hate to say this but they are all nothing alike
well as I say, they are, in how you access them and who is responsible for doing so.
and the reasons for blocking each individualy differ quite a bit.
Blocked is blocked, why is for the law to sort out itself.
To make it secret is even worse. Why don't you do the internet a service and educate people about these issues directly.
Creating a list of places to go for illegal activity would seem counter productive. Especially since this would be basically a list for people in other countries to use as go to place for sources.
I suppose you will take down WALL STREET's webs since their all about gambling.
If israeli citizens are not allowed to invest on the NYSE then... sure it should be blocked if there's no public benefit to being able to see it (not taken down, wall street is operating legally within the US, that's the problem, the Israelis can't shut down a legally operating monaco gambling site but they can block access to it).