Eh, 'renewables' (presumably you're thinking of solar and wind-generated electricity) don't really directly compete with oil (at least in the USA). Oil is a negligible part of our electricity generation mix. This might somewhat delay the switch over to battery-electric vehicles, as it lowers the cost of gasoline/diesel, but that has relatively little to do with renewables, per se, and more to do with the relative costs for electric power (regardless of source) and gasoline/diesel.

A secondary effect, however, could be that it temporarily wrecks the fracking industry in the US, eventually leading to much less natural gas production, raising the price of natural gas (and thus being good for wind/solar, which will probably have gradually declining costs for the foreseeable future).

Renewables compete against the long-term oil price, not the spot price. If the Saudi are offering long-term cheap oil I haven't noticed.

I'd guess negative, cheaper oil makes renewables less competitive.

Low oil prices makes it harder to compete for other energy sources.

Yes - negative impact.

At the end of the day renewable energy is just producing a commodity product - electricity. As fossil fuels decline in price the wholesale price of electricity declines making it less attractive to build wind/solar etc. Existing plants will obviously stay online but people who invested in that sector will be hit.

yes ;)

High enough oil prices and people invest in alternatives But oil and its products are used in the production of many renewable infrastructure too ... so there's a point of diminishing returns.

And at this point the issues of long distance transportation and large scale production are hurting both ends.