Easily, see... right wing extremists are usually connected to racism and anti-semitism. The last time they got their hands on some power, well, you know what happened. But let's ignore the big elephant and just talk about the regular nazis... you know, the dudes that brutalize people to death on the street for having the wrong skin colour. Literally. They've done these assaults for decades, while islamists have only really started to become a European problem within the last few years. They'd have to continue being a problem for a long, long time before they're in the same league as right wing extremists.
Another thing that makes them more dangerous, they have access to political tools. Islamists usually do not. While both may be violent, only one of them has the permanent option and opportunity to gain real power that could do some real damage. And it's sheep like the forum dwellers here that are always in danger of enabling the return of the evil.
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I assumed by "DNA Testing" he meant some sort of criminal record bullshit. Not "is his DNA good enough for him to wield a weapon."
But go ahead and act like you are, you're totally coming across as a voice of reason... /s