Anti-Marriage Ideals Date Back To The Beginning Of Socialism.

We should be far from surprised that Labour, Greens and Lib Dems contain so many members opposed to marriage as a building block of a stable society.
(Note too how the tories do precious little of note to prevent this bigotry.)
For marxism/socialism to win power, the first prerequisite is a society in disarray.
A number of early, well-known, senior marxists professed 'shame' for having married.