It's important to clearly state what is meant when people talk about Soros' "liberal" or "progressive" values: the work I have seen is almost exclusively concerned with the mechanisms of politics, not the content. It is motivated by his experience of seeing both fascism and communism devastating his native country and opposes both extremes. The work I was involved in organised debating competitions for students from Afghanistan to Zimbabwe and everything in between and there's nothing "liberal" about it, unless you count allowing women to participate on equal footing as such.
Also it's worth noting that factual statements about Jews can be used in antisemite contexts. For example, "there are so many Jews in Hollywood..." is not incorrect, but it's easy to imagine how that phrase is typically used.
OTOH, unless we're saying Jews in Hollywood, or George Soros, get a free pass just because they happen to be Jewish (assuming Soros even is; I suspect most people who criticise him don't know), then we need to be careful of silencing legitimate criticism by falsely labelling it anti-Semitic.
Read what the leaders and far-right populist movements in Poland and Hungary say about Soros and you can't miss the 'old conspiracies'.