A couple other details:
I had once caught a few minutes of the perfectly serviceable 1979 original with Alan Arkin and Peter Faulk, which I've heard manages to coast on the considerable charisma of the leads. Well Michael Douglas and (especially) Albert Brooks are no slouches when it comes to comedy, and though Douglas is obviously in check-cashing mode it is deeply uncomfortable to watch comedy legend Brooks hopelessly flounder trying to make something worthwhile out of the material here.
In fact one of the few dvd features is a few straight minutes of Albert Brooks trying multiples takes on one pointless, unfunny scene.
It's obvious this movie was cut and re-edited so many times as to make entire stretches nearly non-sensical. Characters do and say things that end up going nowhere, and you're left pondering why these things are happening, or why an actress's makeup is smudged and running for no reason.
Here is the second half of the movie, for anyone curious
Honestly the first half has most of the weirdest and more offensive moments, but the ending is still hard to imagine being conceived by functioning human minds.
I believe that one theory as to "why, for the love of god, why" this was made is that Meet the Parents had found commercial success 3 years prior, and the idea was that any comedy about parents must be a moneymaker. Rather than just make one of the characters a stern ex-cia officer they decided to graft an entire spy plot onto the movie. They were so committed to this espionage business that it virtually takes over the movie, forcing the wedding, wives, and children of these titular in-laws deep into the background. It really is like Meet the Parents but all the jokes have been lobotomized and replaced with sub-austin powers spy intrigue.
As anyone who's read all this can tell I found this movie's existence and construction so baffling that it has taken up considerable mental space in my mind. I'll leave with mentioning that the most memorable running gag and closest the movie comes to a genuine laugh is the idea that Albert Brooks carrying a disposable cup in his fanny pack, and that his being a foot doctor somehow necessitates this, inspires endless mirth in anyone who sees it.