Mohammad began his efforts that would result in the Islamic religion in about 632 AD.Antisemitism has never been an aspect of Islam if you care to study some history. On the contrary it emerged from politicized Christianity over a thousand years before Islam existed. It's always been lurking in the colonial powers too.
It's a resurgent phenomenon in Christian civilization. Fascism began in Italy and demonized Jews, same in Germany and the same in the USA.
Even today they are lurking, just waiting for something to awaken them again.
The biggest act of violent antisemitisim ever carried out in the USA was not carried out by a Muslim, but a white Christian.
2018 attack at Tree of Life synagogue
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But why did he do it?
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Christ and Christianity got started around 33 AD.
600 years is not a thousand.
But then you rarely get facts correct.
Nor do you arrive at correct conclusions.
Hence you nearly always earn "Fake News".