‘Sending a KKK themed image to tell a Black legislator you don’t like her abortion stance’ is not nuanced enough for me to say it’s okay or not okay.
Emailing a KKK themed image with captions to tell a Black legislator you think her abortion stance is like the KKK’s abortion stance (hence the KKK themed image), seems insensitive and adversarial, and in this case probably untrue, but I don’t think it is outrageous, indecent, a threat of violence, or otherwise sufficient for damages and a restraining order.
~Max