I read the discussion at your link. It just confirms that there is absolutely no evidence any of these quotes or even family mottos has any basis in fact.

If you say someone said something you must be able to prove it with original sources.

If the quote was allegedly made by someone long dead then you need to point to a physical publication from the time either authored by that person (direct evidence) or by an independent direct witness to the statement directly quoting that person (first hand hearsay) and also check for denials by the author or other witnesses.

Otherwise your are just engaging in wild speculation and fabrication which also happens to be anti-semitic.