That is weird, disturbing and unprecedented... Specially scary because no one in the Republican party seems to care about it and nobody dares to call out Trump or his lawyers for even putting such distasteful legal scenario on the table and in front of judges... This kind of stuff will only continue to divide the country, in my opinion.
The theory of full immunity is more complex that it seems at first glance. It is intended to allow the president to take pretty much any action in defence of the country and give orders that ordinarily would be classed as crime, and it also frees him from prosecutions. However, the "impeachment" is not based on the legal aspects, but on a political judgement and this can potentially become a dictatorship by elimination of the opponent since all that is needed is a majoriy.
My personal conclusion is that there has to be a limit to the immunity precisely to protect the system from people like Trump who are fine breaking the system while owning a party.
To be it is clear that there is supposed to be a legal limit to what sitting president is supposed to be allowed to do, regardless he is a president from the United States or other country.
I have red before that the founding fathers of the United States forged the rules and the constitution of the country in a very smart way, but they could not foresee someone like Donald Trump to try to even suggest to misuse the office of the presidency for whatever plans he has. Within the laws or rules of the presidential immunity there would be some article which explicitly states the president of the country cannot target a citizen or a resident with out having some Approbation from a percentage of the senate or at least permission from a judge.
I don't know to what extent he would be actually capable of abusing political power in such disturbing way as his lawyer suggested.
If you want to see misuse of the presidency, just look at all the lives that Biden took by funding Ukraine. Trump only brought about peace.
Of course, the President has limited powers if Congress wants to stop him. He's not a king, you know.
Biden has used his rights correctly and requested congressional support for the Foreign Policy he has chose to implement, as is his right as elected President. We are back to you really trying to not understand dumBAss - the fact that you do not like something does not make it illegal. Breaking the law does however make it illegal and gets you tens of felony charges.