In his twitter, Sangakkara says, I understand the need for vigilance completely but common courtesy and manners is not too much to ask for.
Luckily the rest of the UK immigration officers were lovely. Coming to the UK for 15 years and first time I have encountered this, he says.
No matter colour, religion or fame every well intentioned traveller deserves courtesy. Luckily for me it was one person and just this once, Sangakkara adds.