Illegal means it is beyond reasonable doubt that there has been a violation of the law. People do not get thrown in jail for donating money to political parties.

Suggesting ideas to political parties is also not illegal.

It is only illegal if the money is donated for the sole purpose of influencing a particular decision.

Ahhhh yes - deconstructing a crime into smaller parts that you pretend are disconnected or entirely innocent - "I didn't kill him, I simply tightened my grip on a small lever that happened to be attached to a gun pointed in his direction" or "I wasn't smuggling, I simply crossed an imaginary line with a bunch of plants".

You're free to try this if you want I guess but please know that courts are well aware of this strategy and will immediately see through you. Unless your argument is that things aren't illegal unless you're caught which is also rather dicey, but again go right ahead, ymmv.