From the fall of the Malaccan sultanate to foreign courts taking on 1MDB, history has taught that foreign meddling in national affairs will only bring detriment, said PAS president Abdul Hadi Awang.

As such, Hadi said those who want foreigners to meddle in Malaysia's affairs for political gain are immoral.

"I am confident that those who invite foreigners to meddle in national affairs simply to win elections, their morals are unfaithful and ungentlemanly," he wrote in an open letter to all political parties today.