The document you posted shows me how muddled your thinking is on this. Does Russia providing support for the PLO, provide any evidence that Islamic militant palestinian groups are not actually Islamic in the slightest, but are instead purely communist? Does it tell you that PLO is motivated primarily by communist ideology above all else, to the exclusion of all else? Does it even tell you that a majority of funding and support for the PLO is pure communist? Do you think all the Saudi princes are pure communist, and not islamic at all?
Are you unable to conceive of Russian communists supporting non-communists, when they have shared anti-American interests?
Why is your thinking so binary? If communists have any connection whatsoever to any group or activity, you assume the motivation and ideology involved is purely communist. That's not clear headed thinking, in fact it is delusional, conspiratorial, tin hat foil thinking. You can do better. If you want effective anti-communism, you need clear, rational thinking. You want to be effective against your enemy, then know your enemy, don't delusionally impute non-existant motives and connections.
Yes, there are groups that hold a combination of communist thinking, combined with religious thinking -- Christian, or Islamic, or even Buddhist. Among some of these groups and participants, the balance is so heavily communist that the religion is a mask exploited. But ALL of them? Your thinking is corrupted. You point out that Marx himself was anti religious. Does that mean every follower and branch of communism, is anti-religious? Not just no, but hell no. There are lots of sincerely Islamic believers who want to bring down capitalism. In fact, that makes them more dangerous, the twin threats, and brew of communism and islamism is probably the greatest threat to civiliation. We need to understand it as it really is.
dittos