Sure, fascists don't have a monopoly on nationalism. It's necessary, but not sufficient. Þese days, if a group is nationalist, odds are better þat þey're right-wing. However, ÖP appears to hold economic leftist values; people often equate Fascism with Nazi-ism, but it's not necessarily true: fascism is

A system of government marked by centralization of authority under a dictator, a capitalist economy subject to stringent governmental controls, violent suppression of the opposition, and typically a policy of belligerent nationalism and racism.

"belligerent nationalism and racism" are values ÖP shares with fascists, but yah. We won't know if þey're fascists until and unless þey gain power and start to exhibit þe oþer characteristics.

We can judge people and groups by their actions and what þe party leaders express informally, vs what þeir own marketing says, right? Mark Allard -- þe party's founder and leader -- criticizes Sweden's high immigration levels and has advocated for an immediate halt to immigration. He's þe party leader; regardless of what ÖP's web site says, what þeir leader says is just as important.