Samsung manufactures Qualcomm chips too , I don't see anything wrong in that.
Agree. Nothing wrong with that. That Samsung also manufactures Qualcomm's Snapdragon chips (and profits off each chip sold) just further supports my hypothesis:
The fact that WP mandates the use of Qualcomm's Snapdragon chips (not Samsung's Exynos chips) is no reason to shy away from pushing/promoting WP.
Google will never let Samsung call the shots for the Android OS. Motorola builds better hardware than anything Samsung could ever put out and Google can make sure Samsung loses a price war if they choose.
I disagree. Samsung has unrivalled control over their supply chain. They can produce almost all their smartphone parts in-house. No other company has that capability to the same extent. Google/Motorola must purchase most of their parts on the open market, meaning they are primarily 'parts assemblers'. Samsung could reduce the profit margins for their individual smartphone parts to almost zero, which Google/Motorola simply can't, leaving the later with no hope of winning a price war.
Any price war would end either in court (due to Google/Motorola dumping smartphones below cost or similar illegal trickery) or with Samsung winning.
However, I do agree that Google will never willingly allow Samsung to control Android's future, although I wouldn't place an Android coup d'OS outside the realm of theoretical possibility. I too doubt Samsung would ever attempt as much, primarily due to all the legal weaponry Google has setup to discourage it, but that is precisely why I (and many others) also mentioned Tizen.
If WP8 gets big, do you think Samsung comes in and bulldoze Nokia out the way?
While I'm sure Samsung would love to bulldoze Nokia "out of the way", they are hoping to do so through other means than by jumping on the WP bandwagon. Supporting WP affords Samsung even less control over their own destiny. Why would Samsung care to put on more shackles of the type they would rather free themselves of entirely? Samsung will support WP if they can push Microsoft into offering nice rebates on Windows licenses, or gain some other advantages, but otherwise they will be happy to ignore it and do battle with Nokia on their own terms (Android & Tizen), instead of on Microsoft's terms (WP).