It's difficult to shift the Overton window in a right-leaning position with a Liberal government, but its easier to shift it with a CPC government.

You're wrong on this. The overton window doesn't shift during a government. The overton window shifts during an election. The reason why the overton window shifts farther and farther to the left in Canada is because we have four federal parties which are left leaning or are leftist. If the Liberals want to win elections, they have to satisfy their base and they have to adopt policies from the NDP/Bloc/Greens so that they don't bleed too much. This is not the case with the Conservatives. They don't have to care about their base. Their base has no alternative. That's why O'Toole gets away with adopting policies which are squarely in the territory of the Liberals. This chasing of voters on the left by the CPC with liberal policies is what causes the overton window to shift. With an alternative to the right of the Conservatives, they wouldn't be able to do this.

We can't even advocate for Western heritage with a Liberal government

And you won't be with the current Conservative Party either.

We can't even advocate for Western heritage with a Liberal government

But that's it. Every other policy the Bloc supports is a leftist policy. Pro big government, pro abortion, against religion, big spending everywhere, climate alarmists and so on. They vote with the Liberals in lock step on almost every bill. They are not right wing. They are a left wing party.

but the PPC can tap to this base

The PPC has lower support in Quebec compared to almost any other province. Everything the PPC stands for (besides anti immigration) is the exact opposite Quebecois vote for.

It's difficult to shift the Overton window in a right-leaning position with a Liberal government, but its easier to shift it with a CPC government.

You're wrong on this. The overton window doesn't shift during a government. The overton window shifts during an election. The reason why the overton window shifts farther and farther to the left in Canada is because we have four federal parties which are left leaning or leftist. If the Liberals want to win elections, they have to satisfy their base and they have to adopt policies from the NDP/Bloc/Greens so that they don't bleed too much. This is not the case with the Conservatives. They don't have to care about their base. Their base has no alternative. That's why O'Toole gets away with adopting policies which are squarely in the territory of the Liberals. This chasing of voters on the left by the CPC with liberal policies is what causes the overton window to shift. With an alternative to the right of the Conservatives, they wouldn't be able to do this.

We can't even advocate for Western heritage with a Liberal government

And you won't be with the current Conservative Party either.

We can't even advocate for Western heritage with a Liberal government

But that's it. Every other policy the Bloc supports is a leftist policy. Pro big government, pro abortion, against religion, big spending everywhere, climate alarmists and so on. They vote with the Liberals in lock step on almost every bill. They are not right wing. They are a left wing party.

but the PPC can tap to this base

The PPC has lower support in Quebec compared to almost any other province. Everything the PPC stands for (besides anti immigration) is the exact opposite Quebecois vote for.