1. It does not mean that all trans people are violent. But it does mean that women must be protected against the risk of violence. The violence is perpetrated almost exclusively by biological males. So biological males need to be excluded from women's safe spaces (toilets, abuse shelters, prisons).

3. Children cannot by their very nature give informed consent, just as they cannot give informed consent for sex, therefore "the advice of the child" is worthless. Transition IS being imposed on children in anglophone countries, strangers are deciding for the child if they qualify as trans and the parents are being overridden or kept in the dark. You can research many examples of this. Here are examples of it being imposed on children as young as two years old: https://100percentfedup.com/sick-three-leading-n-carolina-hospitals-offer-gender-affirming-care-to-children-as-young-as-2-yrs-old/

4. A transphobe is being defined by trans rights activists as someone who doesn't want to date transgender woman, so your logic is circular. Trans activists are literally banning people for saying they don't want to sleep with them. And the spaces that they are being banned from are spaces that were created by them and for them. It is as if I invited you into my house, then you stole my keys, said it is your house now and kicked me out because I didn't want to sleep with you.