The level of bravery of the Iranians inside the country is off scale, that of those among the Diaspora participating in protests is still huge given the risk. Those not participating too much (very rare!) still millions of times more justifiable than that of people who have nothing to fear from manifesting freely and safely.
The calculated cost/benefit calculation that some leftists (me one of them generally - but not in this case) are doing, is just using the wrong calibration weights, “hate for a specific faction/team” rather than just “love for humanity and justice” (which I assume people won’t argue is a leftist pillar).
That said, I find it very distrustful to smear people who were active in another cause for not being active on the Iranian cause(or demanding that Israel should be allowed to kill more people considering the low international reaction to the Iran killings - i’m still not sure what this person is advocating for alongside with some Israeli influencers).