Can I join the party if I fundamentally do not agree with its values? Such as, I think the party should have absolutely no control over the army, the judicial p

Can I join the party if I fundamentally do not agree with its values? Such as, I think the party should have absolutely no control over the army, the judicial process, the selection of ministers, influence over state controlled media and many, many other presumably big points of contention? Because in the West you can form a party even if you fundamentally disagree with the parties already in power. If you go back a few decades the green parties and the nationalistic parties as we know them today didn't exist in most of Europe and were formed as reactions to feeling of the government not sharing the same fundamental values.