You've picked out conservative handful. That you defend this 'source' concerns me deeply.
I also need to mention some shortcomings in your reasoning. The database and numbers that you have summed up don't actually demonstrate that a majority of Muslims worldwide are extremist or any more violent that any other religious or ethnic group. The reason is that the database doesn't show the number of perpetrators. For all I know (because, as I have just said, I don't know and can't possibly know from that database), a group of forty Muslims perpetrated all of those attacks in that 30-day period. Using that hypothetical, are you going to tell me that 40 is representative of 1.3 billion?
Let's make the hypothetical more realistic. Let's assume one natural person perpetrated each of the 164 attacks in that 30-day period (as the database says). Let's assume it has been that way every month since 1990; that's 89 months as of May. 164 (again, a number from your 'source') attacks for 89 months. Basic arithmetic will yield 14,956 attacks since 1990. Assuming one person perpetrated each, that's 14,956 persons who perpetrated terrorism; is 14,956 a fair representation of 1.3 billion?
Let's make the estimate liberal, let's assume 100 different persons committed each of the 14,956 attacks since 1990—it's a bit of a far-fetched estimate but I'm giving you the benefit—, that leaves us with 1,459,600 persons. Is 1.4 million a fair representation of 1.3 billion? Do you finally see from my perspective? It's a fraction, of a fraction, of a fraction that we are looking at, but apparently it is now acceptable to treat them all the same and live in perpetual fear and hunkered-down from the 'other.' A shame we're here, at this point, after centuries of a variety of 'colors' and 'species' of terrorism.