On the mask issue, I think there are a number of factors as to why people are perturned by them. I had great difficulty with them early on, though I think I'd more accurately describe it as repulsion or revulsion rather than fear. I found myself having to force myself to get over it, but it took a few months.
Firstly, we have many years of societal conditioning that when we see people wearing a mask it pretty much means one of three things : we're about to undergo a traumatic medical event (probably surgery), something bad is about to happen (eg. a robbery or a physical attack), or the person is downright weird and better avoided (if you're old enough, remember what was said about Michael Jackson when he was wandering around with a mask on). So suddenly when you're surrounded by people with masks in 'everyday' life, it is downright disconcerting, because you've been taught that it means something bad is happening - not just in the vague sense of remembering that there is a 'pandemic' that the behavioural scientists seemed to think was useful, but in a rather more immediate, threatening, sense.
Secondly, there is something hard-wired in humans that expect, and need, to see faces, moving and emoting. Look up 'still face experiment' for details.
And thirdly, as mentioned above, for those of us that opposed all these measures, it was disturbing and irritating to see the vast majority of people wearing a symbol of compliance (or at least not resistance) to them, and something that additionally we suspected at the time (and have since confirmed) was also entirely useless. I've not-entirely-flippantly made the point before that it was like legally making everyone wear a baseball cap saying 'I support invading Iraq' in 2003, which I would have found equally troubling.
Finally, though this didn't apply to me, some people have severe issues with masked people due to previously having been physically or sexually attacked by people with covered faces, or by their face being forceably covered during such an attack, or both.