There is evil in this world. We are each responsible for our actions. The Pittsburgh Synagogue murderer is one of the evil ones.
Anti-Semitic Democrats and haters like Louis Farakhan are not responsible for the murders any more than President Trump is responsible for the pipe bomb mailer, or Bernie Sanders for the guy who shot Republicans practicing baseball.
As a conservative, I believe in personal responsibility. Put the blame where it belongs. If the news organization you read or watch finds a way in one of the three cases cited above to blame a third party for an act of evil, I would seek an alternate source for my news.
But then you are responsible for the misinformation you choose to ingest.