A website set up to raise funds for the boxer Christophe Dettinger showed early on Tuesday that it had received pledges of more than 114,000 euros (£102,316) to help him.
Marlène Schiappa, junior minister for equality, said: "Contributing to a fundraising kitty to support someone who attacked an officer is tantamount to being an accomplice to these grave acts of violence".
Mr Dettinger, known in the ring as "The Gypsy From Massy", a town near Paris, turned himself into police in the capital on yesterday morning.
However, supporters of the Yellow Vest movement have branded Dettinger a hero who was simply "beating" officers at their own game.
People surveyed by Ifop gave Macron the most credit for defending France's interest overseas, but only 19 percent said they believed he understood voters' concerns.
Leetchi initially defended its hosting of the fundraising, saying it was simply a "neutral" online platform.
Mr Dettinger, 37, later said he had "reacted wrongly" in anger after he, his wife and a friend were tear-gassed.
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Meanwhile, the Macron government has pledged to crack down on the protesters following their eighth consecutive weekend of action, with Prime Minister Edouard Philippe announcing on Monday that the administration is considering banning participation in unauthorised protests.
One protester, Maxime Nicolle called it the "tax collector's referendum".
Recent surveys suggest 75 per cent of the public oppose his government's policies and 60 per cent were unimpressed by his New Year message, in which he said he understood popular anger but remained committed to his reform programme.
Many protesters claim they are simply responding to police violence, pointing to a video showing a police captain hitting protesters in the southern city of Toulon at the weekend, and their heavy use of teargas and rubber bullets.
The protesters drew support from a unlikely source yesterday when the two leading figures of the populist government in Rome urged the "yellow vests" to continue, in comments which risk ramping up Italy's war of words with President Macron.
While the number of protesters has dwindled since December, the determination of a smaller but increasingly radical core of "yellow vest" protesters poses a dilemma for the government.
The yellow vest movement, originally against fuel tax hikes, has snowballed into a wide protest against the rising cost of living, which prompted Macron's government to announce a minimum wage hike and other financial relief. The poll comes to light amid tensions over the so-called yellow vest movement, which has been protesting for eight consecutive Saturdays across the country calling for greater fiscal and social justice.