Those two passages don't seem to indicate any kind of merging. Where is this "Chrislam" idea coming from?
I remember seeing a news article in which a fanatic Christian was admiring the zealous faith of Muslim suicide bombers. She felt Christians needed to emulate that kind of passionate, militant faith.
These religions are too important to the self-identity of ethnic Europeans and south Asians (except India of course), respectively. To merge these two groups would need to see one another as the same people, the same population and culture. I don't think that's going to happen this soon. Someday, maybe, but not any time soon.