Because the bad guys knew he was a Patriot, would not be on their team. They were afraid of him and had to get rid of him. Remember, they wanted to fire him, and when the evil queen lost they didn't want him on the Trump Train.
Remember Peter Strzok: First we fuck Flynn then we fuck Trump.
They were carrying out full surveillance on Gen. Flynn long before the Nov. 2016 election. An illegal surveillance. You mean after the election they had to manufacture (lie) a reason which would appear to be legal.
n fact, that's what all the FICA warrants were. Attempts to make what they always had been doing to appear legal. All this illegal spying was done with the belief they would never be found our. They never thought she would lose.
And to punish him, get him fired and ruin his life as well. Plus, it was tied in to the media in the Russia, Russia, Russia story. Pres. Trump is an agent of Russia.
Remember: How long has Q been telling us they are stupid?