Protests against the government and against government actions are allowed in liberal regimes in general yes.
So you agree with me that US, UK, France, Germany, ... are not liberal regimes at all. 
Those are your words not mine. You can protest peacefully in any of those countries. Can you in Iran?
A different matter is if you try to violently impose something in those countries. Are you?
It is so simple: You are free to make your view known and convince others in most western countries, with very few limits. You are not free to damage property or injure others. In Iran you cannot make your view know, period.
That means that all this show of condolences means nothing, as there is no way of expressing any other view. I know you need to say something, but you need to find something realistic to say first. This comparison is ridiculous.
BTW, yellow vests protest on the price of gas mostly (interestingly, Iran coin is going down the pit with a 50% decline during your "beloved" president mandate. Yellow vests have 3 million members, most of them in the same physical condition as when they joined an free to speak and act peacefully as much as they want. If you start burning cars in the street or acting violently, you will get into trouble.