A gentile with a host of anti-Semitic expressions to the general public, spreading serial lies, stirring up a discourse of hatred to the core, spreading conspiracies, fantasies, hallucinations and nonsense about the coronavirus, which caused many not to get vaccinated, to get infected and probably also to die, persecuting university professors and a host of other abusers, although he publicly supported the State of Israel, was murdered last night. An important rabbi eulogized him. Is this allowed?

Ugh.
His ”problematic” views are very widespread among the moderate right in the US, and they are not delusional at all, (even if I don't agree with them) He didn't lie more consciously than anyone else, I'm sure that when you say he lied, you mean that he said things that you personally think are not true. Speaking gently and inclusively against abortion, in favor of family life, against changing the US constitution, and so on – is not called hate speech, maybe speech that you hate.
He was pleasant and certainly not abusive. A family man who was murdered because of his opinions (who, compared to the standards of the extremes in Israel, is more calm and moderate than Benny Gantz)
Your blabbering – which clearly comes from blindly listening to the catalogs of others and not from direct acquaintance with the man's words – right after his murder, is uglier than ever.
It always disgusts me to see a catalogue of lies that follows a person's political affiliation, without really bothering to listen to what they have to say. But seeing it right after the person has been murdered makes me throw up in my mouth. It's not appropriate even if it were a famous anti-Semite.
If this were a serious question and not proper hate speech, you would have phrased it differently.

Check out Wikipedia and you'll see what a scoundrel and outright liar we're dealing with.

Of course, I was right. Not surprised.
We are committing a host of war crimes in Gaza. Look at Wikipedia (English) and you will see what a scoundrel and liar we are.

Come on, based on a short investigation in Wiki, you write a host of such atrocities? And you exaggerate things that were barely written in Wiki (like a host of anti-Semitic expressions, when they barely found a retweet of a tweet that itself was not anti-Semitic)
Disclaimer, he is not a sheep that has all blue (the mistake in the original) but who is?
If Yinon Magal had been murdered by shooting at some Israeli conference, would you have asked that too? And he is another provocateur, unlike Charlie.
This is disgusting. The reaction of a decent person should be shock. I would have been shocked and would also condemn the murder of Amos Schocken for the sake of example.
PS. Sorry for demonstrating on people in a risk group.

For many Haredim (and not specifically, but for the right in general), he is truly a true Tzaddik, and soon they will go to his grave to be leveled…
https://forum.otzar.org/viewtopic.php?f=51&t=67231