I am genuinely surprised with Sri Lanka agreeing to tour Pakistan and am expecting appropriate security arrangements have been made to tackle the threats.
Pakistan would probably win this series even if the experienced Sri Lankan players were in the team which is why I am expecting Sri Lanka to lose this series, but they will definitely give them a tough fight. It will be interesting to watch how Pakistan perform after their World Cup journey.
When was the last time the terrorists attacked a sporting event in Pakistan? I am not very knowledgeable about the situation there, but I guess major cities are as safe as it could get. Obviously the Sri Lankans have reasons to be worried, as they were targeted during the last tour. But times have changed and the PCB has made better security arrangements this time.