You can't just exclude someone from Sunnism just because they do things that embarrass you or Sunnis generally.
Just Sunnism? We have declared them to be outside the fold of Islam altogether. With Shias, it is damned if you do, damned if you don't. When we (Sunnis) exercise patience as these despicable organizations visit tragedies upon innocent Muslims, the Shias claim that we are not doing anything and
demand for us to condemn them. When we prove that these organizations have renegaded from Islam and condemn them on an international level, the Shias come back to remind us that these are from among us.
The main point is that they define themselves as Sunnis and in opposition to Shias, make extensive use Sunni ideas and source texts, etc..
They also define themselves as Muslims, primarily and use Islamic texts, namely the Qur'an, to justify their crimes. Would you now say they are Muslim?
Deflecting on this issue may work when you do it with white people, because white people won't press on the point for fear of seeming "islamophobic". But don't expect Shias not to openly point out the obvious, i.e. all of these groups like ISIS come exclusively from your people.
Deflecting? Deflection and defection are for the Shias, my brother. Your ancestors defected from mainstream Islam and you are masters at deflection. To the white people you say that ISIS is not an Islamic entity; to the Sunnis you say that it is not a Shia entity. You keep deflecting issues that affect the ummah while claiming that you are all for unity, or at least for the betterment and improvement on this ummah.
Your entire ideology is based on deflection. I have cited this example before and I have seen it on many YouTube videos as well where the speaker will go off tangent, to that which is irrelevant, to fan the flames of hatred. I was at a Shia mosque in 2015 during Muharram listening to a lecture in which the speaker intended to highlight the qualities of Umm Salama (ra). He spent half the time, if not more, attacking Aisha (ra) and Hafsa (ra). Must we lower the other wives (ra) of the Prophet (saw) in order for Umm Salama (ra) to stand out? Umm Salama's (ra) rank is not contingent upon what Aisha (ra) did or what Hafsa (ra) said. And then I hear Shias moan that we elevate other Sahaba (ra) while trying to lower the rank of Imam Ali (ra) when they are guilty of what they charge us with.