An anti-abortion group in Wisconsin was attacked with a molotov cocktail, and an unknown group calling itself "Jane's revenge" and claiming to defend abortion rights said it was responsible.

We can expect that the cancellation or Roe v Wade will lead to plenty of right-wing cruelty to take revenge for, but it's not happening yet, so the idea of revenge now doesn't make sense.

In addition, it is the antiabortion movement that has repeatedly engaged in violence (including murder of doctors). The abortion rights movement has acted nonviolently.

Those two reasons, plus the fact that the supposed group is unknown, lead me to speculate that maybe this was a false-flag attack.