ugh we were discussing muslim opinions, not whether suicide bombings are/aren't against the teachings of islam
if it is not in Islam, what relevance is it that the people in question are "muslim" or not, as what defines them as "Muslim" is their Islamic beliefs. If Islamic beliefs are not the issue (they aren't as suicide and thus suicide bombing is against Islam) then the problem is not with Muslims but with another demographic that just happens to consist of many Muslims.
You are completely ignoring the fact that Islam cannot be a legitimate cause of suicide bombings and also ignoring the fact that many of these terrorist attacks are based on political agendas with nothing to do with religion but everything to do with political strife in those regions.
I mean using your logic, you could argue that African Americans are over-represented in US jails, ergo being African American is bad, which any reasonable person would agree is a stupidly racist assertion that completely ignores the other factors that could lead this demographic to partaking in criminal activities, namely that they are also over-represented in poverty, lack of education etc. It is a very similar case with Muslims around the world.
I'm not justifying their actions, I am simply saying that Islam is not a legitimate reason to partake in these activities, and as a Muslim is defined as a follower of Islam, them being Muslim has nothing to do with it. Them being poor, uneducated and from a region that has often been at strife with the West politically, militarily etc. has much more to do with it.