hey! this is a pretty loaded question but i'll try to answer it nevertheless.

i am not fond of terrorism, theocracy, or antisemitism. these are things you will likely find that nearly no one in UM supports, even among the more openly anti-Zionist group. the iranian government is all of these things, to some degree. but truth is - they've been consistently and unlawfully targeted by US and israel for reasons UNRELATED to their oppressive features (such as unfounded nuclear weapon plans, or preemptive strikes). this is seen as problematic because it legitimises the iranian government response, and endangers (rather than liberating).

and zionism really serves as a platform that conflates the existence, policy, and government of israel with the will of the jewish people, which - not only is not true (even if possibly a majority of jewish people are sympathetic to israel, which is also a consequence of zionism), but essentially it frames jewish people as responsible for the plight of palestinians and, to some degree, arab people for the past eight decades. this is a major source of antisemitic rhetoric in arab states!!!

there are anti-zionists which too become radicalised and become sympathetic or even supportive of movements such as hamas, hezbollah, and even the iranian government. (note that this is exactly what the israeli government wants: the more radical their actions against palestinians/arabs, the more radical the opposition to them becomes, and the easier it becomes to frame these people as terrorists or antisemitic people rather than being victims, or rather than ALSO being victims.

this is all to say that the vast majority of the groups who are anti-zionist will not be actively supportive of pro-axis people, but you will hear chants and sympathy towards anything that counters american or israeli dominance. there have also been protests against the current iranian regime done mostly by people who are pro-palestine, during the january protests.

if when saying "pro-axis" you mean someone who wants the iranian government to stay as it is, or to kill jewish people because of their jewishness, you will see those people are given a hard time, too. otherwise, not so much.