Why do people from Assad's Syria, in areas he controls and which have
Russian military bases (such as Latakia), block you after asking them
if they would like a wall, and then to build a very
high and very long wall along the rainshadow area of their country?
(At which point they tell you to not speak of such things, as they
don't speak of politics online, at which point you tell them your
support for a wall, and they respond "SHHHH" and (@Vixuzar) block you)

Is Assad still clinging to the notion that a multi-cultural country
with people of different types anywhere is a long-term viable solution
and thus punishes any talk of a fine long and tall wall?

People of different types don't give a damn about other in general:
If they don't want your girls, then they don't want you.
And if they do want your girls, they could do without you.

Are people that want a wall punished?