A lot of this looks like Linda can't accept having won a major battle. When you win, the other side doesn't simply go away. It retools its message.
Debating whether today's cultural leftism is "really" the same communist or socialist message of the past looks like something of a dead end. Do conservatives "really" want to restore 19th century conditions and policies, or have we moved on? I think the second is true, not the first.
You certainly raise some excellent points. I would argue that you are perhaps presenting a false dichotomy - you are saying that either the gay agenda is just that - something being used to promote the welfare and rights of a particulary group - or a communist, gramscian attempt to destroy the moral fibre of a country and that it has to be one or the other.
I think I'd disagree for two reasons.
First of all, I see no a priori reason why it has to be just one or the other and not, in fact, both.
Secondly, the article presented some good historical evidence where Gramsci and the Hungarian (Lukasz?) and possibly others set out to deliberately promote aberrent sexual behavior to promote their communist agenda. While this sort of historical evidence is not, in and of itself, proof - it does suggest that there may be something to all of this.