Well first off, being a man is not an immutable characteristic, because transgender people exist.
Second, the difference between the two groups you bring up isn’t relevant in this comparison, because pointing out the differences between them doesn’t negate the similarities. Both are groups with an inordinate amount of power (physical or legal) over any outgroup and are supported by cultural norms that allow them to exercise that power largely without repercussions. Both groups are also protected from consequences by others within the group, regardless if the others agree with their questionable decisions. And most importantly, both groups are human, meaning the individuals vary widely within the group along the moral spectrum. Even if most within the group are good, bad actors will always exist and there’s no way to know which one you’re dealing with at face value.
Even if it’s not a perfect comparison, it’s apt enough to support my point.
Well first off, being a man is not an immutable characteristic, because transgender people exist.
The aspect of being a man that makes people consider you a threat by default is an immutable characteristic though, if you are a trans woman people will treat you that way even more than otherwise.
Being a man is immutable, unless you are saying being transgender is a choice.
I brought up the largest difference between the groups, not the only significant difference between the groups. One is a choice, the other isn’t. This difference alone is more important than any similarities your comparison can draw.
It is a highly flawed argument that only serves to get back pats from those that agree with you.