>>64145811 (OP)
About the only real merit is that it does have an effect, how positive it is really depends were you have the bomb go off and who gets hit. Especially with forces that are heavily reliant on some kind of public support for food, money, shelter, recruits and intelligence. So if they blow up too many of the locals, that can literally 'blow up in their faces' with no support and they get a no-knock in the middle of the night by some guys.
It is also a fairly desperate action
You are telegraphing that alternatives like not dying and expending troops like this is something you really only do when there's no alternatives and you're kind of fucked. They can spin it however they want about being hero of the state or martyrdom but the result is more or less someone going sky high because there wasn't another way to do it. However, a lot of these forces don't really have any training, actual experienced and EFFECTIVE combat troops are often in really short supply. Plenty of goobers want to do the gangsta shit but they're ultimately bumbling, useless cunts that fall into the left side of the bell curve for success at anything. Which does make them easy to recruit I guess, blow yourself up and get some virgins you incel cunt or everyone will love you and we'll (totally not) look after your family if you go do this one simple thing...
Hell, some of them will do it for $50 and a clean set of clothes!
No one actually useful gets sent into these things as
>>64145859 mentions, none of the shot callers and people who can shoot straight get this kind of job. It's all the dumb dumbs, druggies, washouts and general human detritus that washes up on your shore that gets convinced that this is the way and gets the job