Since this is off-topic...
Is it immoral to stop someone from stealing from you?Is the financing of public healthcare, educational system and infrastructure "stealing"? :-)
It's really boils down to one of those fundamental issues that that you either believe in, or say that you believe in but don't really. Freedom.
As a very simple example, take property tax... It's simply there. Period.
You are FORCED to pay it basically at then wrong end of a gun. This is how government works. They make physical threats and actually follow through on them with force. None of that is controversial or inaccurate.
However, in the case of property tax it is slavery. Period. There's not really much to debate on the topic there. Slavery is forced labour. Property tax forces you to participate in the economy in order to pay the tax. It forces your labour out of you. Again, nothing controversial. Well, unless someone thinks that slavery is ok, or things that it matters *how* someone is forced to work.
Property tax removes the option to not participate in the economy. This is a complete violation of a person's freedom.
Property tax is stealing, is theft, is forced labour, is slavery. It steals your labour. Is it theft of the fruits of your labour. It forces you to work (slavery) through threats of violence against you. (I would take it that kidnapping someone and forcibly confining them is violence.)
Property tax eliminates the freedom to simply be left alone.
Now, the typical retort is usually something about "who will provide water, electricity, roads, whatever." The answer is pretty simple... Does it really matter all that much who does it? And why not just get people to pay for their water, electricity, roads, whatever? There's more than 1 way to skin a cat.