Anti-Semitic comments have never come from the SSPX although some comments did come from an SSPX clergy from whom shortly thereafter the SSPX disassociated themselves. 

In regards to the founder of the SSPX, Archbishop Lefebvre may have been excommunicated but unjustly so, which is why Pope Benedict lifted all excommunications on SSPX bishops during his papacy. All SSPX priests, while not having jurisdiction in an archdiocese, are validly ordained Catholic priests and their Masses offered therefore also valid. Rome and the SSPX have been in talks for a number of years now as they hopefully move ever closer to fully reconciling. Pope Francis himself has made strong gestures recently in helping to move talks forward ... there seems to be no real story here except about a land acquisition.