I see that Brent Green Party alongside Channel 4 News is trying to make hay out of Tulip Siddiq's confrontation with Channel 4 News. The case is described here. I would be truly surprised if either of them is unaware of the parliamentary convention that you only raise matters relating to your own constituents. Under these rules, the Speaker might reprimand Tulip if she took up the case.
As far as I can see, she is being urged to simply because she is of Bangladeshi heritage and related to eminent Bangladeshi politicians. This is one of the subtler ways in which ethnic minority politicians are treated differently.
In answer to the comment, I don't think Tulip was trying to threaten anybody; she was just rather clumsily trying to extricate herself from a confrontational situation. I notice that she has apologised for the remark anyway.
The way Channel 4 has targeted her because she is Bangladeshi is because they know that she has no connection to the case they are raising. Anybody who has ever worked in a MP's office, or had much dealing with them, knows that it is standard not to deal with the casework of people who live in other constituencies. Thus Tulip has campaigned for
Nazanin Zaghari-Ratcliffe to be released as Nazanin Zaghari-Ratcliffe is a Hampstead and Kilburn constituent. Ahmed Bin Quasem is not a Hampstead and Kilburn constituent. His case should be raised by his own MP, and I am sure that Channel4 News know that full well. They have gone to Tulip simply because she is Bangladeshi in origin. I think it is wholly inappropriate to start expecting MPs from ethnic minorities to raise cases in Parliament simply because they involve people from the same ethnic minority.