Please don't mix with this Mustafiz scenario with that of Pakistan players being banned in IPL.
Pakistani players were banned before starting of auction but Mustafiz was bought in Auction and then this happened. Before his release there were life threats and protests from Hindu fundamentalists and then suddenly BCCI ordered IPL to release him saying due to "recent developments all around". This clearly state that BCCI was not confident to give Mustafiz security and security reasons was the reason. If it was due to only a political decision, IPL would never take Bangladeshi players into auction like what they did to Pakistani players. And Bangladesh or Bangladeshi people didn't do any such extra thing in this period (between auction and release) which made the relationship more cold between India and Bangladesh.