Mr Peters has gone as far as to say he "will put a stop to sales of land and houses to non-residents".
Prime Minister John Key supports the deal as long as the correct processes are followed and Economic Development Minister Steven Joyce has accused Labour of xenophobia in opposing the deal.
The station was a "ridiculously small amount of land" in the North Island to sell off, Mr Joyce said.
That's true, but if the deal goes ahead it will still be the second-biggest sale of New Zealand farmland to a foreign owner in terms of value, and one of the biggest by area.
It is vital that a knee-jerk political move does not influence the sale of Lochinver Station. This would be unfair and would also frighten foreign investors, who are crucial to our economy.
However, land ownership is an important issue and one that Kiwis obviously feel strongly about.
The long-term impact of large tracts of land being sold to foreign buyers is worthy of reasoned debate.