You never complained about Obama to them or your wife the past few years? Why the surprise?
The reason behind your problems with family about politics is one reason my father told me to never discuss politics with others. You can lose a lot of good friends discussing politics or religion...To this day the only way I know Dad was a republican was he couldn’t stand Eleanor Roosevelt and she had a husband that couldn’t shut her up publically. It can cause brother to not talk to brother or sister for decades and isn’t worth voicing your opinion, especially is you know theirs....just let it rest....Hope things get better all around for you and the total family...