What I mean is that Islamic Terrorism can be traced to left wing refugee policies and their obsession of diversity
That's a pretty absurd argument. Promotion of diversity did NOT cause terrorists to become radicalized. Western imperialist and hegemonic policies, which are generally right-wing policies, created the roots of Islamic extremism. We need to distinguish between promoting diversity on the one hand and imperialism on the other. Imperialism involves imposing control on other nations and cultures; it is not pro-diversity, but rather an attempt to force monopolarity in geopolitical and sociocultural affairs. The West's control and influence was seen as a fundamental threat to a segment of the more conservative Islamic population, resulting in backlash that gave rise to the situation we now know. This backlash was not fueled by a respect for diversity, but rather by a fear that the crush of Western power would wipe out traditionalist values in the Middle East.
Only by conflating respect for diversity with imperialism can you attempt to make the argument you're making, and that conflation is fundamentally erroneous and ideologically-motivated. There is much evil that can be blamed on left-wing extremism, not because it is left-wing, but because it is extremist; however, in this case, the evil of Islamic extremism arose from right-wing policies. The tendency I have seen in your posts to blame anything and everything you dislike or fear on the left is nearsighted, troubling, and, arguably, an extension of your own prejudices rather than an attempt to impartially and rationally arrive at the truth.