Why not let International entities Finance domestic politics

Both? If international entities financed Canadian politics wouldn’t the international entities loyalties be to foreign countries and wouldn’t the interests of those receiving the funds here in Canada also be to foreign countries?

I think most of the electorate are too busy with the necessities of living to be able to sufficiently oversee the political process. The US is a prime example of where money can Trump (pun intended) the interests of the electorate. I think there should be more limits, not less, on political donations in Canada than there are now.

If nothing else, such a change would invite us all asking "why would someone who's not Canadian care so badly about the results of a Canadian election?"

It's a reasonable question.  I might be interested in an election in Slobovia, and I might even be rooting for this or that party, but not enough to write one of them a fat cheque.