Why almost always when I am reading about transwomen - they are attacking some vulnureable group of people or minors?

Coz men using the con of trans identity to horn in on and stomp all over women's spaces, sports and rights - and to dismantle and ride roughshod over safeguarding of children and people with a wide range of vulnerabilities and disabilities - is the new form of colonization.

Most men nowadays aren't as interested in invading each other's countries and trying to take over the world as so many men customarily were for most of human history. Humans have already been there, done that too many times over the course of millennia for men to get the thrill out of it they once did. And a main lesson of the modern age is that military conquests and colonization usually work out badly for the colonizers in the end.

Also, there are no new lands and cultures to "discover" any more - all the far corners of the earth have been explored, mapped and are now connected. Males can no longer entertain fantasies of finding Shangri-la over the next mountain, or beauties on that island on the far horizon. Nor can they even prove their manliness by scaling mountain ranges like the Himalayas; Everest base camp has become a trash dump teeming with people - and on days that it's possible to summit, people stand for hours in a single-file line coz there's a massive traffic jam to get to the top.

At the same time, there's no longer big enthusiasm for space travel the way there once was back in the 1950s and early 1960s. Elon Musk aside, the idea of doing things like colonizing Mars and exploring the moon lost their appeal amongst the general public quite a long time ago. By the time of the first moon landing in 1969, many earthlings - even many patriotic Americans - were no longer thrilled and wowed by the feat as most everyone was just a decade earlier. When the moon landing occurred, many people didn't even bother to watch it on TV...

So men whose lives once would've been all about seeking adventure, power and glory by taking up arms and using technology to try to take over other people's territories nowadays have little or no desire to participate in that kind of warfare IRL any more. They'd rather put on wigs, lipstick, fishnets and heels to invade and take over female spaces and sports. Much easier - & much more sexually arousing too. Nowadays, the exotic foreign lands "modern males" fantasize about and seek to enter and mark as their territory are ladies loos, female changing rooms, rape refuges, women's shelters, female prisons, girls and women's sports, etc.

But the core impulse is the same as the one that drove colonization throughout history. And that impulse, in turn, is very much related to the nature of male sexual functioning, which evolution unfortunately has arranged to be invasive, penetrative, piercing, overbearing and domineering.