I agree with Kevin entirely. The first paragraph of the section is highly debatable. Certainly, "Jews!"-slogan is a recent invention. Condescending use of the epitaph has been around a lot longer, unfortunately. In that light, the paragraph needs serious revision.
Also, it would greatly benefit from mentioning last year's attempts by the club to reduce if not eradicate the slogans altogether . The club argued it was inappropriate and hurtful to many of the club's Jewish supporters, the statement must be out there on ajax.nl.
Regardless of any of the above, hardcore Ajax supporters are not exclusively Jewish, neither currently nor historically, which is definitely worth mentioning in light of the symbols and slogans.