What does that have to do with interfering with somebody else's political party?
You don't donate money to them.
You don't work for their campaigns.
What gives you the right to participate in their nomination process?
By all means do your own thing, politically, but you've no right to be a party-crasher.
As for the center making sense, that's just your opinion.
There's no perfection in this world.
Your actual choice is going overboard or going half-assed.
Also, the American "center" is lightyears right of the western civilization center.