It's hard to get more Masonic than freedom of thought. It may be impossible to get more Masonic than two who bitterly disagree sitting in lodge and conversing in a respectful and civil manner. Remember what Brother Voltaire said, "I may disagree with what you say, but I shall defend to the death your right to say it."
if it's a liberal / conservative, big government / small government, socialism / free market, government takes care of your whiny butt cradle to grave / personal responsibility issue... just forget about it. being a liberal is not anti-masonic. our organizing roots are that of a labor union. as we're a reflection of the society we're in I'd guess that perhaps another one or two out of every ten in your lodge share his beliefs. Just as in my lodge in the People's Republic of Austin about half are liberals and two or three out of every ten are screaming flaming glittering jewels of liberalism. Doesn't make them any less my Brother just cause I don't believe as they do.
the only really true Masonic Political Belief: I believe in an independent judiciary, a representative legislature, being a good and peaceable citizen in a government operating solely by the consent of the governed, with equal treatment for all, and a free people exercising force in a civil manner at the ballot box choosing their leadership. And remembering that a person is supreme to an institution, especially a religious institution and most especially a government institution. (see Knight Kadosh, Knight of the Black & White Eagle aka the 30th Degree of the Ancient & Accepted Scottish Rite of Freemasonry). Not to get off on a rant here, but it was Government Institutions that killed two hundred million people in the last century. In the past four thousand years or so collectively the single largest murderer of people has been Religious Institutions and usually murder not in furtherance of their interpretation of the Grand Architect but in furtherance of their earthly power base, their short-term temporary frivolous earthbound BS struggle for power and wealth. A sun bleached skull can only tell you three things: he was a man... he lived... he died...
A truly Great thing about Masonry I've seen first hand: At Austin Scottish Rite I have personally sat at a table and shared a meal with Brother G (who's as Jewish as they come) and Brother N (who was a Colonel in the Luftwaffe during WWII) without a single scintilla of discord, discomfort, or contention in the air.
Now that is light, My Brothers!!!