You can't call legalized abortion a holocaust and call abortion providers murderers and then suddenly be all surprised and outraged that someone shoots up a Planned Parenthood clinic. This is the end result of "pro-life" rhetoric, and the cowardly right-wingers are just sticking their fingers in their ears and ignoring it, hoping it'll go away.
People like Sneed are especially culpable. When you use language like, "we have to harvest their brain," you basically suggest that people who work for Planned Parenthood are evil, Dr. Mengele types. Rubio is also guilty of condoning murder because he thinks women should die if abortion is medically necessary to save their life. If you think that way, it's not a huge leap to murdering abortion doctors.
