This is exactly what was claimed in Iraq, and while I'm sure you can find some few idiots or optimists, it is completely false at the relevant level. There is no such thing, and has never been such a thing, as a country welcoming an invasion by another country, at least not in the last few hundred years since nation states developed, and since explosives became the major means of war.

This is especially false in Iran in relation to USA intervention, since both the democrats and the fundamentalists still remember how the USA & UK deposed their last democratic leaders and (re) installed the brutal dictatorship of the Shah, who both parts of Iranian society hate and remeber being oppressed by today.