Well, no, that is not a reasonable interpretation at all. For one, the commenter did not proclaim existence of conspiracies, but the existence of conspiracy the

Well, no, that is not a reasonable interpretation at all. For one, the commenter did not proclaim existence of conspiracies, but the existence of conspiracy theories. People mix these up a lot. Secondly, the other interpretation you propose exhibits roughly the same form as "X does A", so it's worth repeating that it does not mean "only X does A" either!