The man is officially a dear friend of Israel, he has never defended Hitler, he indeed supports the German far right party, his chatbot had an alignment issue that has been patched within 16 hours.
What you call a "Sieg heil" was an innocent hand gesture made once, and that hoax has been debunked by both the anti defamation league and the Israeli PM personally. You know this, yet you cannot let go of your hate.