Maybe I am missing something in the cited article, but I find no reference to Bishop Schneider's diocese or residence in Kazakhstan and we live in times when many falsely claim authority.
Wherever a Williamson or LeFebvre may be found, it is NOT in the Roman Catholic Church. Of course, Williamson may have some claim. Benedict XVI lifted his excommunication before realizing his, ummm, thoroughly eccentric Holocaust denying views. If he was excommunicated again, it would begin to seem like a tennis match. An interesting question is whether Fellay may have the power to excommunicate Williamson from the SSPX schism after Williamson's excommunication was lifted by Benedict XVI. The mind doth boggle in dealing with Schismaticland!
See #28.
He also wrote a book on the Holy Eucharist that has a forward by Cardinal Ranjith.
Dominus Est It Is the Lord! Reflections of a Bishop of Central Asia on Holy Communion
Bishop Schneider has ordained deacons for them:
http://www.institute-christ-king.org/news/181/92/2011-Ordination-Week-in-Gricigliano/
He has also ordained priests for the FSSP:
http://fssp.com/press/2014/05/bishop-athanasius-schneider-ordains-seven-in-omaha/
I recommend you make an appointment with an exorcist.