Prime Minister Viktor Orban of Hungary, Europe’s perennial rule-breaker and a champion of national sovereignty, said on Friday that he had invited Israel’s leader, Benjamin Netanyahu, to visit his country and would ignore an International Criminal Court arrest warrant against the Israeli prime minister.

Hungary, unlike the United States, is a signatory to the court and thus formally obliged to act on its warrants. But Mr. Orban, in a defiant message on the social media platform X, dismissed the warrant against Mr. Netanyahu as “brazen, cynical and completely unacceptable” and said Hungary “will guarantee his freedom and safety” should he visit.

Mr. Orban’s vow to protect Mr. Netanyahu from arrest made Hungary the first European Union country to openly flout the I.C.C. ruling.

The arrest warrants issued Thursday against Mr. Netanyahu and his former defense chief Yoav Gallant have put many countries in an uncomfortable position, particularly Germany, whose desire to separate itself from the horrors of the Holocaust during Nazi rule has made it wary of criticizing Israel and its leaders.

Steffen Hebestreit, the German government’s main spokesman, said in a statement Friday that the country was “one of the biggest” supporters of the international court, noting that Germany had helped create the I.C.C. statutes under which the arrest warrants were issued. But as “a consequence of German history” it has “a unique relationship with and a great responsibility for Israel,” he said.

Asked to clarify his written statement, Mr. Hebestreit said at a news conference in Berlin on Friday that given Germany’s past, he would not expect the country’s police to carry out the arrests if it ever came to it. “It is difficult for me to imagine that we carry out arrests in Germany on this basis,” he said.