Was not commenting you or Indian history (hence Huns and Mongols, the latter were warded off by the Delhi Sultanate, which Indian right wingers find hard to acknowledge) but the phenomena of rise of right wing pathos in the world. Most of the time it has arisen it has from a sense of being left behind, or 'stabbed in the back' narrative.
In the Indian context I have seen right wing sympathies among those who feel uncool, among low self esteem men (the gender bias is quite surprising). This is not the only birthing factor, but from anecdotal evidence from my own surroundings, it matched many examples.
> Carrying out general massacre, destroying places of worship
>
You mean Mongols did not do general massacre with and without destruction of places of worship prior to turning to Islam. If you believe so, that would be quite an unique belief.