The police reaction has been no different from that of security forces' methods against similar groups at Occupy Wall Street protests in the United States, he insisted.
"The police obviously have the mandate to establish public order," Kalin said, just like they do in Spain, Sweden and Britain.
Experts and human rights groups say Erdogan's government lags when it comes to human rights and freedom of expression by opponents.
"Prosecutors and courts continued to use terrorism laws to prosecute and prolong incarceration of thousands of Kurdish political activists, human rights defenders, students, journalists and trade unionists," Human Rights Watch wrote in a 2013 report on Turkey.
Turkish journalists are afraid to write anything critical of the government, and media companies are slapped with huge tax fines for covering uncomfortable topics.
According to the Committee to Protect Journalists, Turkish authorities have targeted journalists with detention for covering the protests.
Erdogan's dilemma is in how he handles those who did not elect him, said CNN's Fareed Zakaria. "He has come to believe that he speaks for all of Turkey."
Those who are against him are handled in "too authoritarian" a manner, Zakaria said Tuesday on Piers Morgan Live.
The prime minister has said he will not back down.
"They say the prime minister is harsh," Erdogan said Tuesday, referring to his detractors. "I'm sorry," he told a gathering of his own party. "The prime minister is not going to change."
Erdogan is tightening his grip on power, adding authority to the office of the presidency, which he hopes to hold in coming years.
Former U.S. intelligence chief John Negroponte said he believes the protests could have something to do with Erdogan's ambitions.
There may be "forces joining in here, whose aim it is to prevent him from achieving his ambition of becoming the next president of the country," he told Morgan.