I was only in the country during the last year of Thaksins premiership so do not know a lot about him. What over 2000 people did he kill? If they were child abusers, murderers, rapists or drug dealers etc, then they did not deserve a place it this world.
I am not in agreement with the death penalty for only one reason, there are always people charged who were innocent. If it can be proven 100% beyond all doubt that anyone is guilty, then yes, give them the death penalty.