I agree, it's actually giving many of them a new way to enact their hatred of women safely under the rainbow umbrella.
And you're right that Stonewall et. al. have been very effective in infiltrating organisations. I don't know why that is, maybe because like you said it's an easy bandwagon to jump on and doesn't require men to make any actual sacrifices or change their thinking. Also, many of the people pushing this stuff in workplaces seems to be women (depressingly) from what I have seen.
As for how to fix the police, i don't know. I think a profession like that will always attract a certain number of unsavoury individuals who want to yield power and control, which is why safeguarding and protocols need to be strictly enforced. But who is going to police the police?
Here in Ireland we have a Police Commissioner who was brought in after a litany of scandals in recent years (including whistleblowers being harassed and threatened) to try and improve things. Unfortunately for him, he has had no real support from the troops in making any changes. In a few years he will leave having achieved very little and they will say he was ineffective, but he got no help because the rank and file didn't want to change anything. So how do things actually get fixed?