> Google has also managed to use the patents to sue other companies including Microsoft.
Can you post a link to Google suing Microsoft first (not in retaliation)? Google was way behind in the patent game until they got hurt. Google bought Motorola to have a defensive patent portfolio. Also, see their Open Patent Non-Assertion Pledge https://www.google.com/patents/opnpledge/
> Open-Source is open source, the only thing that matters is license here and it is as liberal as it could get MIT.
Open Source is where it is today from the decades of hard work by many, many people (in the early days, just for the love of it with no pay). MS is doing Open Source today because it really has no choice. There is no comparison between these two.
Open Source can welcome MS, but it should demonstrate a willingness to work towards the best interests of the movement. There are bigger goals here.