Americans should bow their heads in shame forever, since their land was "stolen from the Red Indians (native Americans) through genocide", says Dr Mahathir Mohamad.

The former prime minister is still livid with US Vice-President Joe Biden over his remarks regarding the Sedition Act and opposition leader Anwar Ibrahim’s case.

Despite criticising Biden on the sidelines of an event last Saturday, Mahathir also penned a blog posting on the matter today.

He said the US believes that it is the greatest democracy in the world and therefore is in a position to tell others what to do.

"On this assumption, Biden ( left in photo ) chastised Malaysia. Who is Biden to take the moral high ground?" he asked in a blog posting today.

He said Biden is the vice-president of a country that detains people without trial for more than a decade, torturing them while in detention; a country where torture is legal, a country which has no qualms about invading other countries, killing millions of innocent people, destroying towns and villages, leaving them without electricity, water supply and sewerage systems.

"What right has Biden to condemn the retaining of a law to prevent racial conflicts and violence in Malaysia?

"Today the US is engaged in assassinating people opposed to America. Malaysia used to detain people without trial. But the US passes death sentences without trial, without the knowledge of the victims even...

"They are made by officials. These people appoint themselves as judges, prosecutors and executioners. This is justice as practised by America," he added.

Mahathir said America dares to claim that it is doing all these to protect democracy.

"What democracy is there for the innocent people killed, wounded and maimed for life? Wherever the US goes there would be deaths and destructions.

"In the US itself there is no justice. Within a short space of time police shot and strangled three blacks. The grand jury then says that there is no case for the police killers to answer," he added.

As for Anwar, whom Mahathir described as "America's candidate for prime ministership in Malaysia", he said the courts have been extra lenient.

He noted that Malaysian courts took more than five years, listening to appeal after appeal with nearly 30 postponements.

"In America, a grand jury (whatever that may mean) decides not to indict and the criminal is free. Where is due process?

"Just don't go around telling people how to behave and what they should not do.

"Tell it to your own people, about how Americans prosper through slavery, through discrimination against blacks and Hispanics, about spying on your own people, about your controlled media, etc. That is what Joe Biden should do," Mahathir added.