Sometimes the situations we live in and the past we were subjected into influence our thought process and this result in prejudice on numerous issues. Filmmakers are not an exception and many feel that is the reason why Tollywood's hatred is different from Bollywood.
It is known that Bollywood filmmakers come up with films painting Pakistan as a villain, showing terrorists operating from the cities in Pakistan and Bollywood heroes entering the enemy nation and singlehandedly bashing the living daylights of the terrorists and the Pakistan army. This has been the norm for many decades and the same is going on.
One can understand their hatred for Pakistan and other Islamic nations as North faced many attacks from Afghans, Moghuls, etc and the rulers from the North successfully prevented many attacks to keep India safe. That is the reason; many from North angrily ask who raise pro-Pak and Anti India slogans to go to Pakistan.
Since South is much interior and North preventing the invaders from reaching here, the people here who never faced or experienced the brunt and pain of such atrocities, come with weird comments that are better to disband the army and concentrate on providing food, clothing, and shelter.
But Tollywood seems to be obsessed with its hatred for the USA. For some reason, many filmmakers are painting that parents who dream of children make a living in the US and children who live in the US as villains and they don't value human emotions and give immense mental torture to elders ignoring them completely and not even caring them after their death.
But this is uncalled for as there are many people working in the US, who shower love and affection and make it a point to visit their parents once or twice a year and cancel all the official meetings in case of any unforeseen happenings and land in India.
Seems people who are jealous of those in the USA and those who couldn't go to the US are spreading these false lies in the name of family entertainers on the silver screen. Some of the hatred for the USA stems from US President Donald Trump's policy of America First.