Creating accounts to post like this will eventually get your main account banned as well, so please don't.
I don't think it's "illegal"; the problem is that these kind of organisations tend to veer towards the toxic and hateful.
Incels are an excellent example of this; the entire concept was started by a woman struggling with her own involuntary celibacy and started a support forum. Good initiative. But over time things have become ... well, rather different.
A lot of the so-called "men's rights" groups have some legitimate grievances, and I have seen more than a few outspoken feminists underscore this. But having legitimate grievances doesn't excuse their terrible behaviour and attitude.
There are some decent groups for this; /r/MensLib on Reddit is pretty good. But the average is not exactly great.
My own view is that I have no problem working with women (though there are some women I would refuse to work with or be around in a social setting b/c of the risk). I suspect I don't mind because I've had a positive experience working in a research lab were the PI was a female, as well as one of the research assistants that I closely worked with: I did one aspect of hardware/software, she did the other.
Smugness makes no sense when what it appears is you have some deep rooted psychological issues that need addressing.