Lately Microsoft has been friendly with Linux. They even released a guide in their website on how to install Linux alongside Windows. If anyone is guilty of actively trying to fight against Linux is Epic. For now, at least.
Until Microsoft opensources Windows, I won't trust them. Maybe not even then. The most dangerous thing they could do is become a linux distro, actually. Make a bunch of proprietary linux kernel modules required to run "Winux"-only applications and any distro unwilling to have proprietary kernel blobs will be killed.
Microsoft is known for Embrace Extend Extinguish. Their greatest feat would be killing linux.