Firstly Cricket is regulated under the auspices of ICC not UN. BCCI is a member of ICC not the indian Govt. BCCI & it is the responsibility of BCCI to ensure the safety of cricketers & it is backed by the indian Govt., but ICC only deals with BCCI,
Now IPL is regulated by BCCI , & therefore is also responsible for the security of cricketers playing in IPL. Therefore, if it cannot ensure the security of one countries cricketers in one league it cannot be trusted to ensure their security in the worldcup.
As for the role of indian Govt & IPL Can you please answer why did the IPL was moved from India to South Africa Last Year , was it not because of the elections 2009.
check this out may be you will recall something