More a clear-away-the-wreckage-of-corrupt-bourgeoise-etc.-etc. kind of thing.
Well, you might have a point. Some of the original queer radicals were, in fact, card-carrying Communists. The Mattachine Society was founded in an attempt by some non-Communist gays whom the Communists had tried to attract, to distance themselves from the guys who were getting investigated by HUAC and the FBI, back in the late 1940's and early 1950's.
Ironic that the FBI was being run by a big old femme in fishnet.
It may not be particular “Marxist” though Marxist thought has become so embeded in so many branches of liberal, “progressive” and politically correct thinking that it becomes hard to be sure of the philosophical pedigree anymore.
But, like Marx, it - destruction of marriage - is from the view of the artificial, engineered man, that must be preceded by man without any moorings. It is impossible to create, to engineer a “new man” unless you have destroyed what supports organic human civilization.
What Marx did not understand, and neither do the practitioners of all the schools of thought who use Marx as a base, is that their social engineering agenda will always fail, because it goes against human nature. They may not see it immediately, do to some short term success, but it cannot create sustainable societies.