Mate, I literally spoke to my former colleague who told me about this local club thing. I knew he was a Rag & originally came from Scarborough, but it never crossed my mind why he became a ManUre supporter.
As for being needy for success. This fella was professionally VERY successful. As for why support Palace or Fulham, you missed the bit where I mentioned the big CL nights which neither club are involved with.
ManUre were the big boss at the time, so he literally chose to support them & followed up his support by studying at UMIST & settling in Manchester after graduating.
He worked for our company whilst doing his PHD in Computer Science, & eventually left for a senior position working for Cunard on wages we couldn't hope to compete with.
The only non-successful part of his life was supporting Scarborough, which he resolved by becoming a Rag season ticket holder.