During the COVID-19 pandemic, public opinion regarding restrictions and lockdowns quickly polarized. In a societal crisis such as COVID-19, it is important to understand the drivers behind citizens’ attitudes and behaviors. Political polarization related to COVID-19 restrictions and lockdowns has often been interpreted as an ideological or partisan divide along the left-right dimension of political opinion. Here, we argue that there is more to unpack. There is increasing awareness that public opinion is structured by two distinct dimensions: left-right orientation and a second dimension capturing trust in the system. In this manuscript, we examine the divide in COVID-19 attitudes and behaviors and show that ideology and system trust are both drivers. Based on monthly surveys from eight countries (US, UK, Sweden, Denmark, Germany, Hungary, France, and Italy) from September 2020 to July 2021 (total sample of 49,414 respondents), we show that citizens with right-wing ideologies and those who do not trust “the system” perceived a lower threat from the coronavirus, were less supportive of government measures against the virus, changed their behavior less, and expressed lower willingness to vaccinate against COVID-19 compared to citizens with left-wing ideologies and those with high system trust. These results are stable across time and across countries. We also find that behavioral differences are larger between those who support the system and those who do not than between those with right- and left-wing ideological outlooks, respectively. This implies that system trust is at least as important as ideology in terms of shaping cleavages in COVID-19 attitudes and behaviors. The results suggest that in order to increase public support for societal responses during a crisis, it is not only important to appeal to both sides of the ideological spectrum, but also to appeal to those who do not trust “the system.”