No way he was expelled in 2008 from SSPX for contacts with Bishop Williamson, who was at that time still an SSPX bishop in good standing.
I don't intend to get involved in this thread, except to recall the following:
Although +Williamson was technically in good standing until 2009, he was nevertheless slated for termination at least as early as 1999 (when +Fellay first attempted to remove him as rector of the Winona seminary).
In 2001, the only things standing between the SSPX and a practical accord were +Williamson and Avrille.
Obviously, Menzingen (and Rome) viewed him as an obstacle to the ralliement.
When I was in Winona, there was a great "under the table" divide between priests and seminarians as to who they backed: +Williamson or +Fellay (mostly for the same reasons).
So yes, +Fellay did not start menacing +Williamson until 2009, but he was already taking practical measures to eliminate him gradually at least 10 years earlier. That being the case, with +Fellay and Rome already knowing their plans for a reoriented SSPX did not include +Williamson, expressing yourself as a great supporter of him would not be good for your ordination prospects.