Standing Up For The National Flag
Brother Burhan. To my understanding, shirk is when we say someone gave birth to Allah or Allah has given birth to a child. Or if someone says that Allah is dependent on someone. Or if someone compares Allah with one of his creation. When we repect flag, or sing an anthem or say pledge of allegiance, we do not break any of these rules. So in my opinion it is not Shirk or not even close to shirk.
Also standing up or following constitution is just following any other agreement. I am not sure which country you live in and what is written in the construction. If there is nothing in constitution that qualify as shirk or nothing immoral or unIslamic acts we are committing to, I do not see anything wrong.
Please share video link for Dr. Israr Sahib. He may be talking about a specific situation.
Brother Burhan. Standing up with what intention? Are people considering flag as a god? As I said earlier, if someone stands up to welcome guests or in respect of an elderly, would it become shirk? It is all by intention.