Proxies can be used to get the software from SF in these countries.
The issue is about principles: freedom to innovate, free access, and to follow open source principles that SF preaches:
The Open Source Definition Open source doesn’t just mean access to the source code.
The distribution terms of open-source software must comply with the following criteria: … 5. No Discrimination Against Persons or Groups The license must not discriminate against any person or group of persons. 6. No Discrimination Against Fields of Endeavor The license must not restrict anyone from making use of the program in a specific field of endeavor.
For example, it may not restrict the program from being used in a business, or from being used for genetic research.
The blockhead action is a direct Discrimination Against around 200 million innocent people in Syria, Sudan, Iran, N Korea and Cuba.