I'm not going to bother looking for links for the smug, patronising people asking for them - but I know for a fact I read articles and heard people on radio shows criticising his inability to speak English when he took over. As well as a lot of people on here saying it would massively hold us back.
Quite funny that the MOTD season highlights included a quote from Pochettino though, saying "In football there is only one language...which is the language of football". I distinctly remember all 3 of the pundits on there laughing at the managerial change when it happened.
I also specifically remember an article from a journalist/columnist or some such saying that he hoped Southampton went down for their treatment of Adkins (treatment which, by the way, simply amounted to firing him).